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Author Topic: LED projector bulbs ? on the way.
Paul Browning
Phenomenal Film Handler

Posts: 1000
From: West Midlands United Kingdom
Registered: Aug 2011


 - posted January 03, 2018 06:47 AM      Profile for Paul Browning   Email Paul Browning   Send New Private Message       Edit/Delete Post 
Interesting idea Brian, you can get strobes with adjustable flash settings, perhaps if the lamp could be linked in some way to the pulse sync circuit this could switch it on and off when a perf is detected, and this would keep pace with the film. The reed switch might not provide enough current to do this, but maybe a relay in a circuit could.....

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Maurice Leakey
Film God

Posts: 5785
From: Bristol. United Kingdom
Registered: Oct 2007


 - posted January 03, 2018 10:02 AM      Profile for Maurice Leakey   Email Maurice Leakey   Send New Private Message       Edit/Delete Post 
Digressing slightly from the subject, but relevant to Brian's posting.
I seem to remember a 35mm projector which had a pulse lamp and no shutter. I believe it was the Philips FP-20.
Has anybody worked on one?

--------------------
Maurice

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Bill Brandenstein
Phenomenal Film Handler

Posts: 1627
From: California
Registered: Aug 2007


 - posted January 03, 2018 02:06 PM      Profile for Bill Brandenstein   Email Bill Brandenstein   Send New Private Message       Edit/Delete Post 
I get very annoyed when I see color temp that's too blue, especially bluer than sunlight. It's one of the reasons why I hate how most HDTVs currently look. Remember, theatrical film prints had color timing to match the bluer Xenon light, and perhaps more importantly, the lighting and decor of the facility can be designed to match. My house has too many warm colors and warm lighting for me to like this idea. If it were around 5400K or a little less, the concept would please me more. Nothing else in nature is that blue, and I think it's lazy engineering to foist 6-7K on projection technology.

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Mark Todd
Film God

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From: UK
Registered: Aug 2003


 - posted January 10, 2018 02:32 AM      Profile for Mark Todd   Email Mark Todd   Send New Private Message       Edit/Delete Post 
I just noticed the new LED type lights COB, been around a few years years but getting sorted and off the ground more now.

Any thoughts ?

Look promising.

https://www.ebay.com/itm/H11-H9-H8-Car-LED-Headli ght-Bulbs-Conversion-COB-36000LM-6000K-1pc-/362164704976?_trksid=p5731.m3795

Best Mark.

https://www.ebay.com /itm/2Pcs-G4-LED-Lamp-2W-DC-AC-12V-Energy-Saving-Mini-COB-Bulb-Lights-High-Quality/152852134107?hash=item2396b278db:g:0MYAAOSwOgdYy4WL

h ttps://www.ebay.co.uk/itm/Super-Bright-Car-LED-Headlight-Bulbs-H7-72W-7600lm-Car-Exterior-White-COB-Light/292219652714?epid=600524471&hash=item4409a60a6a:g:584AAOSwVRpZl1fG

Or just put cob led in to ebay for a nosey.

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Brian Fretwell
Phenomenal Film Handler

Posts: 1734
From: London, UK
Registered: Jun 2014


 - posted January 10, 2018 02:59 AM      Profile for Brian Fretwell   Email Brian Fretwell   Send New Private Message       Edit/Delete Post 
Pity there aren't any 6v side pointing LEDs (well I haven't seen any), they would be very suitable for editors.

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
Registered: May 2017


 - posted February 05, 2018 05:57 PM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
Hi all! I'm following this thread with great attention, as well as other similar ones regarding LED replacements. My aim is to find one that suits the most regular, 12V 100W MR16 form factor ones. A quick search on Google probes that it's not an easy subject as one would expect, or I'm maybe doing the wrong search. Do these definitely exist? I don't mind having to order them from China and waiting a month or so, and even if they got lost in during its journey it would be worth the attempt as its not an expensive item. I wonder why I don't see any clear info about this on the forum, even with direct links to online stores where one would buy them [Razz]

I'm also doing my research locally. I mean - here we have plenty of these so-called "Chinese stores" where you can buy anything. They also have their typical lighting section, with plenty MR16 models. For a while I've been seeing replacements for the 50W 12V type, but that was all...
...but last week I happened to spot a couple of definitely new models - they were 8 and 9 W each, and advertised as 80 and 90 W equivalent respectively. Couldn't resist getting one for testing purposes. I finally got the 8 W model (advertised as 800 lm) because it was the only in white light. I knew in advance it wasn't going to be a proper replacement, but wanted to try.

It would almost fit into my projector, if it weren't because it lacks the little "flange" their halogen sisters have for keeping it in place. Anyway, I managed to get it in the right position for a while while testing. Certainly it makes like 10-20% more light than its 50 W halogen equivalent, but it's not suitable for proper projection, yet. But it makes me wonder if we are as close as it seems. I also like the nice white light it made, which made my testing 8mm B&W reel shine, giving a very clean image (if it weren't because it wasn't clear enough).

And almost nothing else. Well, I have to say that this bulb has a 160º light beam, and almost no leds in the center, so it worsens the condition.

I also though about some moding, mainly for placing more leds in the middle. Do you have any idea on how this would perform? If I could remove some leds from the borders and place them more close to the center, narrowing the beam, I'm sure I would get decent results.

Last thing is that, as expected, it doesn't get hot. Well, you can feel some sort of warmness if you touch it, but there's plenty margin until reaching, let's say, half the heat of a halogen.

PS: post edit in order to correct some mistakes due to falling asleep [Big Grin] . Also added some more info.

[ February 07, 2018, 03:52 PM: Message edited by: Pere Pasqual ]

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
Registered: May 2017


 - posted February 07, 2018 04:54 PM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
Just to boost this thread:

I don't know if it's allowed to post links to buying sites, but in my search for led replacements I'm very tempted on trying some of these ones being sold at chinese online stores.
After a huge amount of time researching, I found this:

https://www.dhgate.com/product/high-power-cree-led-lamp-12w-4x3w-dimmable/1446 22609.html#ENhp-en

There is a number of very similar products on that site, but I like this one the most dues to some factors:

- It has a lot of user reviews (currently some 260), the vast majority of them being very positive. Although they start from 2013 (if not upgraded, the product could be a bit "old").
- I read in some of them that they are successfully using them for halogen replacement (they don't specify if it's for a projector, though).
- The measurements seem to fit inside a standard projector.
- Reviews are very recent, so this probably mean it's a very recent new model.

So in this link you can buy a 10 piece pack (at least) of 15 W dimmable (that doesn't really mind) MR16 pure white, warm white or cool white bulbs, for about $20, with free shipping. Beam angle is 270º, though.

Do you think it's worth the attempt?

Also there are these ones:

https://www.dhgate.com/product/9w-dimmable-led-bulb-12w-bulb-15w-led-bulb/1771 59874.html#ENhp-en

They are 15 W too, but the bean angle is just 60º, very narrow so I understand it should work better for projectors. Price is slighty higher, but still less than $30 for a 10-piece pack. Reviews start from 2014 (much more less, about 45, but still a relevant number).

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Matthieu van der Sluis
Master Film Handler

Posts: 369
From: Barendrecht, The Netherlands
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 - posted February 08, 2018 12:51 AM      Profile for Matthieu van der Sluis   Author's Homepage   Email Matthieu van der Sluis   Send New Private Message       Edit/Delete Post 
For projection, you need the light coming from a small spot in the middle. So I believe you throw away a whole lot of brightnes that won't be used.

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Phil Murat
Jedi Master Film Handler

Posts: 651
From: Villeneuve St Georges, France
Registered: Dec 2015


 - posted February 08, 2018 04:01 AM      Profile for Phil Murat   Email Phil Murat   Send New Private Message       Edit/Delete Post 
I agree with you Matthieu,

Something like that should make the job :

[URL=https://www.aliexpress.com/item/Chanzon-LED-Bulb-1W-3W-5W-10W-20W-30W-50W-100W-High-Power-Epistar-Chips-COB/32811656870.html?spm=2114.search0104.3.16.4fd54b0fXljQTM&ws_ab_test =sear]https://www.aliexpress.com/item/Chanzon-LED-Bulb-1W-3W-5W-10W-20W-30W-50W-100W-High-Power-Epistar-Chips-COB/32811656870.html?spm=2114.search0104.3.16.4fd54b0fXljQTM&ws_ab_tes t=sear[/URL] chweb0_0,searchweb201602_1_10152_10151_10065_10344_10068_10342_10343_10340_10341_10084_10083_10618_10305_10304_10307_10306_10302_10313_10059_5722311_10184_10534_100031_10103_10624_ 10623_10622_10621_10620_10142,searchweb201603_36,ppcSwitch_3&algo_expid=1ecb4bd4-46a1-49b8-abb8-2705f0603cc2-2&algo_pvid=1ecb4bd4-46a1-49b8-abb8-2705f0603cc2&transAbTest=ae803_5&pr iceBeautifyAB=0

Also, it is very important to install a very good driver do decrease "Flickering" phenomenon to almost zéro....

A condenser lens could be necessary too

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
Registered: May 2017


 - posted February 08, 2018 03:53 PM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
This starts moving! [Big Grin]

Very interesting info, indeed. I'm very tempted to buy one of these. Which one do you thing would fit best for our purposes? Maybe the 10 W one? I see the "fordward voltage" for these ones is the closest to our machines: from 9 to 11 V, and luminous flux is about 1000 LM. Still a bit less than a halogen lamp (how many lumens do these emit? Maybe some 1500?), but starts looking interesting. Would that extre Volt burn our lamp or have any significant negative impact on it? What about the 20 W ones? They are rated for 30-34 V, so we would need some voltage regulator or so in order to get it worken. My electronic skills are very limited, though [Frown] , but I have some abilities with solder and making PCBs.

Also, I found this 60º lens for led:

https://es.aliexpress.com/item/1set-LED-Lens-Optical-Glass-44mm-60-degree-Reflector-Collimator-Houseing-Fixed-Bracket-with-Holder-For/32806017168.html?spm=a219c.10010108.1000023.19 .1d4f5270mVXSov

Anyone willing to experiment? [Wink]

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Adam Deierling
Jedi Master Film Handler

Posts: 709
From: OH
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 - posted February 08, 2018 04:00 PM      Profile for Adam Deierling   Email Adam Deierling   Send New Private Message       Edit/Delete Post 
Been down this road guys. I tried all configurations and more you guys haven't listed. The biggest problem with the LED is getting it to focus all of its light millimeters in front of it where the film gate is. You have to almost treat this like a xenon design where you have a big reflector to ounce the light into and focus it into a single point. Thats where the design of this new LED is interesting to me as they seem to have been able to do this.

Don't get me wrong, I have tried an m16 lamp that fit perfectly into the projector lap socket and it did project an image but it was not very bright. I have also tried 100w led chips which output upwards of 5k-10k lumens, nothing matches the original halogen. Again it comes down to focusing the light. You also have to have adequate cooling with LEDs this big as they get very hot.

I am sorry to say but buying an off the shelf led bulb isn't going to work here. A specific design has to be engineered to work properly. I think these guys in Germany are on the right track. Just be patient.

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
Registered: May 2017


 - posted February 15, 2018 04:08 PM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
Thanks a lot for reporting, Adam. And please forgive my delay in participating.

I am interesting on which exact configurations have you tried, because I couldn't infere it 100% from your post. For instance, did you try the ones Phil Murat linked on his last post? And what about some kind of lens like the one I suggested?

If you haven't, as these are inexpensive items, I'd give them a try...

---

I am editing my own post because I want to add further questions and discoveries.

for instance, I see a lot of references on the net to some "CREE XML XM-L LED" that seem to be the ones used for high-lumen torches and so. If they can work with batteries with a very narrow angle and large distances, why shouldn't them work for projection?

A quick search shows that is easy to find cheap supplies for those on the typical stores:

https://www.aliexpress.com/item/1-PCS-CREE-XML-XM-L-T6-LED-U2-10W-WHITE-High-Power-LED-Emitter-Diode/32796030941.html

https://www.aliexpress.com/item/1-PCS-CREE-XML-XM-L-T6-LED-U2-10W-WHITE-High-Power-LED-Emitter-Diode/32800476827.html

Look at the power, current and lumen ratings of these. Also look at the shape of the light source itself and the dimensions of the full "chip". They assure they deliver about 1200 lumen. Power is 10 W and current is rated for 3.2-3.6V @ 3000 mA max (so I understand we would need some voltage regulator). Diamether of full PCB ranges from 12 to 20 mm, so we have plenty of space to fit them into a regular MR16 reflector...

Then they I found these new ones at a Spanish store, the biggest advantage being that they seem to be ready to work at 12 v (delivering about 1000 lm; more with more current):

https://www.shoptronica.com/led-de-alta-potencia/1745-led-de-potencia-10w-blancos.html

Those ones, for 13-15v and delivering about 1500 lm:

https://www.shoptronica.com/led-de-alta-potencia/1703-led-de-20w-16-chip-con-lente.html

In the same page you can see that there exist plenty of reflector for this model of led and other, too. Dimensions vary and I'm not sure which ones would fit better to our needs; in my measurements I see that classic MR16 are between some 42ish mm for internal diameter and about 50 mm for external. Here are some reflectors with similar dimensions; even more, on some pictures you can see the LED already mounted on them:

https://www.shoptronica.com/reflectores-metalicos-para-led/3249-reflector-de-aluminio-de-42x33mm-para-p7-mce.html

https://www.shoptronica.com/reflectores-metalicos-para-led/4182-reflector-de-aluminio-de-42x31mm-para-xml-xpl.html

https://www.shoptronica.com/reflectores-metalicos-para-led/4183-reflector-de-aluminio-de-415x315mm-para-xml-xpl.html

https://www.shoptronica.com/reflectores-metalicos-para-led/4290-reflector-de-aluminio-de-409x32mm-para-xml-xpl.html

This one is rated for 5-10-20 W leds:

https://www.shoptronica.com/reflectores-metalicos-para-led/1957-reflector-metalizado-de-57x22mm-para-led-5-10-20w.html

And finally, some optics. I don't know almost anything about how they work, but they state the angle is wider or narrower depending on the focal distance, from 22 to 65º:

https://www.shoptronica.com/reflectores-lentes-para-led-de-alta-potencia/1017-lente-de-cristal-de-445mm.html

There are plenty; these ones work between 25 to 30º wide, which looks very narrow to me, and are specific for those high luminosity "XM-L" leds (or "CREE XML"). To me it looks very "focusable":

https://www.shoptronica.com/reflectores-lentes-para-led-de-alta-potencia/283-lente-acrilica-43mm-para-seoul-p7-z7.html

It may look like advertising but it's just what I've found surfing the web. In another store's blog (https://www.ledsupply.com/blog/7-cool-diy-led-projects/), they have this little project of a "projector" with one of these tiny leds, with a couple of AA bateries. There is a 2 min video showing it and looks very promising:

https://youtu.be/VpOF2CrQvsM

Please excuse me for the big amount of links and messy information, but I'm really reluctant to believe that currently we cannot still fit one of these inside our old projectors and make them work. There should be someone with good knowledge of these and/or optics which could, well, enlighten us on the matter...

[ February 20, 2018, 03:44 PM: Message edited by: Pere Pasqual ]

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Adam Deierling
Jedi Master Film Handler

Posts: 709
From: OH
Registered: Nov 2010


 - posted February 22, 2018 10:25 AM      Profile for Adam Deierling   Email Adam Deierling   Send New Private Message       Edit/Delete Post 
I am confident that LED technology can work for our projectors but I have yet to figure out the right design. I have tried chips that are rated upwards of 6k-10k lumens and still not able to put more light on screen than the halogen. Its not a matter of fitting the LED in the projector its a matter of focusing the light. Ive spent too much money and time on this. I am no engineer so I will wait for someone smarter than me to figure it out.

I am not trying to discourage anyone from trying. I want you guys to experiment and see if you can figure it out. There is the potential to turn our halogen projectors into xenon equivalents that run on less power and longer lasting bulbs.

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Matthieu van der Sluis
Master Film Handler

Posts: 369
From: Barendrecht, The Netherlands
Registered: Aug 2017


 - posted February 22, 2018 10:42 AM      Profile for Matthieu van der Sluis   Author's Homepage   Email Matthieu van der Sluis   Send New Private Message       Edit/Delete Post 
I know of people who make lightsaber props and are always searching for brighter LED's.
I myself have replika lightsabers that look as real as possible.

They are using Lenses for making the lightbeam more narrow.
You also nead a heatsink for the LED.
Here is a website that sells stuff they use:
http://www.thecustomsabershop.com/Cree-XP-E2-C136.aspx

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Reid Baron
Junior
Posts: 4
From: Elizabeth, NJ, USA
Registered: Feb 2018


 - posted March 25, 2018 07:16 PM      Profile for Reid Baron   Email Reid Baron   Send New Private Message       Edit/Delete Post 
Can anyone recommend a suitable replacement LED bulb for a basic editor / viewer, which uses a typical 10 Watt 6 Volt (G3) BA15S Single Contact Bayonet Mount incandescent bulb? The bulb temp should be about 3,000k, which would emit a good white light. Thanks.

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Phil Murat
Jedi Master Film Handler

Posts: 651
From: Villeneuve St Georges, France
Registered: Dec 2015


 - posted March 26, 2018 10:27 AM      Profile for Phil Murat   Email Phil Murat   Send New Private Message       Edit/Delete Post 
Hello,

May be this is for you :

[URL=https://fr.aliexpress.com/item/Nanoshine-date-P21W-LED-ba15s-1156-led-filament-puce-de-voiture-lumi-re-S25-auto-v/32840441832.html?spm=a2g0w.search0204.3.1.1193756eVSSgQW&s=p& ws_ab_test=searchweb0_0,searchweb201602_3_10152_10151_10065_10344_10068_10342_10343_10340_10341_10696_10084_10083_10618_10305_10304_10307_10306_10302_5711211_10313_10059_10184_1053 4_100031_10103_10624_10623_10622_10621_10620,searchweb201603_25,ppcSwitch_5_ppcChannel&priceBeautifyAB=0]BA15S Led Conversion[/URL]

or

BA15S 6V Conversion

And, of course, only works with DC .....

Let us know

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Brian Fretwell
Phenomenal Film Handler

Posts: 1734
From: London, UK
Registered: Jun 2014


 - posted March 26, 2018 03:57 PM      Profile for Brian Fretwell   Email Brian Fretwell   Send New Private Message       Edit/Delete Post 
I found this G4 12v LED in Clas Ohlson that looks promising. I have bought one but not tried a conversion yet.

https://www.clasohlson.com/uk/Northlight-G4-LED-Bulb/36-1322

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Alan Gouger
Master Film Handler

Posts: 451
From: Florida
Registered: Jun 2003


 - posted March 26, 2018 04:26 PM      Profile for Alan Gouger   Email Alan Gouger   Send New Private Message       Edit/Delete Post 
quote:
I am not trying to discourage anyone from trying. I want you guys to experiment and see if you can figure it out. There is the potential to turn our halogen projectors into xenon equivalents that run on less power and longer lasting bulbs.
I have also tried every combination of LED and lens,including a 8000 lumens output setup which was not nearly bright enough. The problen has already been mentioned the light from LED is not focused you would need a custom reflector and lens to capture and focus the light through our tiny S8 gate.

Best option is HID.

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
Registered: May 2017


 - posted April 17, 2018 10:42 PM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
quote:

I found this G4 12v LED in Clas Ohlson that looks promising. I have bought one but not tried a conversion yet.

https://www.clasohlson.com/uk/Northlight-G4-LED-Bulb/36-1322

I don't know what is going to work, but it's easy to figure out in advance what won't, and this one won't, for obvious reasons. You can see it in the specs:

- Its luminous flux is 100 lm. That's 10% or less of a regular halogen lamp.
- Its power is 1.2 W. No matter how efficient it were, you can clearly imagine that's not going to equal the brightness of a 100 W one.
- There it says also "Equivalent to (incandescent bulb) 10 W". Halogen is far more brighter than an incandescent one at the same wattage, so go figure.

I think that if we are not able to discard these in advance, better refrain from attempting any further experiments. There are already a lot of "potential" candidates that are not going to work anyway to even lose money and effort in the obvious non-working ones...

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Brian Fretwell
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Posts: 1734
From: London, UK
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 - posted April 22, 2018 04:03 PM      Profile for Brian Fretwell   Email Brian Fretwell   Send New Private Message       Edit/Delete Post 
Sorry I didn't refer back to my earlier post, but this was for a replacement for a 10w editor bulb which is non halogen so it would be an equivalent power. The editor has no reflector, but does have a condenser lens.

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Matthieu van der Sluis
Master Film Handler

Posts: 369
From: Barendrecht, The Netherlands
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 - posted April 23, 2018 01:48 AM      Profile for Matthieu van der Sluis   Author's Homepage   Email Matthieu van der Sluis   Send New Private Message       Edit/Delete Post 
Ahh that's interessting indeed.
Let us know how it works.
For now I use van Ecks Halogeen version for my editor, which I think they convert themself.
https://winkel.van-eck.net/SF-0103.html

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
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 - posted June 19, 2018 09:22 AM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
I recently got a couple 100w 12v halogen bulbs and still cyclically stumble upon this issue.

Common sense just doesn't allow me to really believe that this cannot be relatively easy accomplished still in 2018. I've done a fair amount of extra googling and "research" and I've found some counter examples showing that it can be done. Some examples:

- Lego projector. This was already featured in this forum when it was brought to life... which was like 7 years ago! The relevant part here is that it uses an inexpensive flashlight as a light source.

The problem here is that neither a parts list nor detailed building instructions where ever published, and that would be very useful in further attempts, at least to get an idea of the minium lumen output of any flashlight to try. But here there go a couple links to inexpensive flashlights that are supposed to deliver a decent amount of light, they are single-chipped, focusable and, when taken apart from the battery casing, it looks like they would fit inside a projector. You can see many pictures of them in action in the ratings section, uploaded by customers, and they seem to deliver to proper amount of light:

https://www.banggood.com/Elfeland-1201-XM-L-T6-2000LM-5modes-Zoomable-LED-Flashlight-18650AAA-p-1172010.html?rmmds=category&cur_warehouse=CN

https://www.banggood.com/MECO-XM-L-T6-3600LM-Zoomable-LED-Flashlight-2x18650-p-982567.html?rmmds=category&cur_warehouse=CN

[URL]https://www.banggood.com/Astrolux-C8-XP-L-HI-1A-1300Lumens-74modes-A6-Driver-Tactical-EDC-LED-Flashlight-18650-p-1217415.html?rmmds=detail-bottom-alsobought__1&cur_warehouse=C N[/URL]

https://www.banggood.com/MECO-XM-L2-5-Modes-2000LM-Zoomable-LED-Flashlight-p-982520.html?rmmds=category&cur_warehouse=CN

https://www.banggood.com/Elfeland-XM-L-T6-3Modes-2000LM-USB-Rechargeable-Zoomable-LED-Flashlight18650-p-1110220.html?rmmds=category&cur_warehouse=CN

https://www.banggood.com/BLF-A6-XPL-1600LM-7-4modes-EDC-LED-Flashlight-p-991823.html?rmmds=detail-bottom-alsobought__2&cur_warehouse=CN

- Light intensity comparisons for different flashlights. With pictures. This at least shows that the proper amount of light can be obtained by using those kind of flashlights, and they use regular batteries, so to my knowledge it should be possible to attach them to a DC power source, right?

I get lost when trying to do the calculations about the current (in Ampers) that a power source, or the projector itself, would need to provide to the led chip (in fact I don't know the ratings for a 100w 12v halogen lamp); can anyone give some hint on this? But I'm confident it should at least equal the one a couple of standard battteries provide...

These Instructables link may offer some light on that question, though.
Another similar one.

- Replacing an electronic projector bulb with a LED cheap one. Not the best link, but, again, showing that something similar to our goal can be sort of accomplished.

Finally, there's also quite few topics in lightning-related forums here and there (maybe these are the best places to ask for help); not the most useful ones but some hints and ideas can be collected from there:

http://www.candlepowerforums.com/vb/showthread.php?434464-Su ggestions-on-how-to-replace-projector-bulb-with-an-LED

Waiting for your comments...

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Adam Deierling
Jedi Master Film Handler

Posts: 709
From: OH
Registered: Nov 2010


 - posted June 19, 2018 09:33 AM      Profile for Adam Deierling   Email Adam Deierling   Send New Private Message       Edit/Delete Post 
The problem is not the availability of intense LEDs to use as projection lamps but the ability to focus the light onto the film frame. The LED flashlights are so intense and yet they are usually small diode LEDs that run off 6 AAs? How is this possible? Reflectors and lenses to focus the beam of light. You need a powerfull LED panel that will fit into a projector and figure out a way to focus it. I would suggest looking into fresnel lenses....

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Pere Pasqual
Film Handler

Posts: 43
From: Gandia, València, Spain
Registered: May 2017


 - posted June 19, 2018 09:41 AM      Profile for Pere Pasqual   Author's Homepage   Email Pere Pasqual   Send New Private Message       Edit/Delete Post 
But have you seen the video of the Lego projector, Adam? It actually uses a flashlight, and it's a model from 7 years ago...

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Adam Deierling
Jedi Master Film Handler

Posts: 709
From: OH
Registered: Nov 2010


 - posted June 19, 2018 09:44 AM      Profile for Adam Deierling   Email Adam Deierling   Send New Private Message       Edit/Delete Post 
Yes I have. Again, flashlights focus the light properly for projection. But you can't realistically mount a decent high powered LED flashlight in a GS-1200...

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