Good Light systems for Home made Projector

[Chernobyl]

Hi
Post here if you have succesfully purchased, made use of and can recommend the light you have for your OHP in your Home Made Projector.
Please give a link to the place you bought from.

http://62.75.177.102/shop2/index.php...0cd968c622f288
Stephan Stange is the chap running the shop.

This guy in Germany came through with an awesome HRI-TS 250 W/D Metal Halide kit for a superb price (see bulb description below). This bulb also should have the name UVS tagged on as it has built in UV Stop which also blocks a lot of Infra red heat. The bulb is rated for at least 6,000 hours operation and may even be 20,000 hours. I suspect it is 10,000 hours, more than a years continuous use!
He doesnt often have stock, so snap the deals when you see them.


The bulb has the following characteristics:
CRI 90 - very good
5100K Daylight colour temp
250W
20,000 Lumens
UV Stop
Smallish size/fittings fine for an OHP
Life 6,000, 10,000 or 20,000 hours (update: 6,000 hours, 3/4 of a year continuous)

The site looks as dodgy as you like, but he responded well to questions by email and sent the goods exactly as promised. To read the site, translate it through Google. When purchasing, use the real site as the Googled one doesnt work.

He does many parts including fresnel lenses, rear spherical reflectors, 400W bulb kits etc. Remember for a 400W system, you will likely need a UV filter to avoid damage to the LCD.

I got a complete kit of Bulb, Starter, Ballast and bulb fittings. The bulbs can only be bought as part of a full kit. I also got a rear reflector (which turned out to be more of a 1/2 sphere and larger than the one in my 3M 1950 OHP). Total cost 103 Euros including delivery to the UK!!

HRI-TS 250 W/D Metal Halide Bulb Description:

Full specs can be found from this page
http://www.radium.de/produkte_overvi...1855,2498,2565

250W rated power consumption
HRI, HQI and HTI all appear to be similar. If the rest of the bulb spec fits, you should be able to use any of these types. Check bulb life is correct.

TS is a double ended power connection

DL Daylight rendering. Typically above 5000K colour temp.

Metal Halide is a much more efficient bulb than the Halogens in most OHPs.

Bulb Considerations when finding a bulb:
Power rating (Watts)
Light power (Lumens. 250W typically 20,000 and 400W 36,000)
Colour temp (around 4800Kish to 5700K for Daylight rendering)
CRI (>=90 The Colour Rendering Index)
Fitting/size
Life (typically 2,000 to 20,000 hours)
UV Stop