Elmo ST1200 LED lamp conversion

[Mark Barton]

Hello all , is it possible to replace a 15v 150 lamp used in my ST1200 (and similar projectors) to a higher lumen output led lamp? Im assuming as LED lamps do not produce the same heat output as conventional 'bulb' type lamps then a higher light output might be achieved. Has any kind soul converted a projector to LED lighting, and greater lumens?? thank you

[Joerg Polzfusz]

Hi!

AFAIK, most LED conversions are only as bright as a 50W halogen lamp.
That’s because brighter LEDs are much larger than the tiny S8 frame. And their light cannot be bundled properly.

At the moment, nearly all LED-conversions have either been made for conversions into telecine devices (where the image doesn’t have to be bright at all) or for projectors with odd bulbs that are not readily available anymore.

[Joerg Polzfusz]

Tveden (while it was still in business) had the most advanced LED-plug-in-lamp:
https://www.youtube.com/watch?v=dUuU1OfCfl4
But here, it was only a replacement for a 100W lamp.
https://web.archive.org/web/20220524...-P5976546.aspx

[Joerg Polzfusz]

No details about lumen…
https://en.film-digital.com/product-...fenlos-mit-lcd

[Chip Gelmini]

Maybe a better way to go about this would be to remove the three blade shutter and replace it with a two blade shutter. Pretty sure Steve Osborne sells the blades, but I don't know who does the servicing. I believe a two blade shutter will give significant light increase

[Dominique De Bast]

Luigi Petrin, in Italy can replace a 3 blade shutter by a 2 blade shutter he manufactures himself.

[Brian Fretwell]

I wonder if anyone has tried going shutterless and using synchronised switching on and off of the LED. Then you could change it between 18 and 24 fps to give the effect of 2 or 3 blades with a switch.