Monster LED'S YOU'VE GOTTA CHECK THESE OUT

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Kobra000

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Joined 2002
#1
I just thought id throw this in the mix for you guys cause these LED's look very very cool..

heres the link for the LED's themselves for auction at ebay

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2526063641&category=26207


heres what the seller had to say about them


Hi,
Stars are rated in "LUMINOUS INTENSITY" @ 350ma (lumens or lm). For the White Stars the typical is 25 lm. The "overall" range is from 13.9 lm to 51.7 lm. The ones that I have up today are 30.6 lm to 39.8 lm. Usually I have 23.5 lm to 30.6 lm in the off white. The ones that go from 39.8 lm to 51.7 lm are VERY rare, and bring about $16.00 to $20.00 each in the market.
Jim


you gotta admit a LED that can put out 51.7 Lumens might be perfect for our projects...only drawback is these things are expensive. go to any search engine and do a search for Luxeon star LED's...i did a search on yahoo and found a ton of data specs in PDF format and found they have some Luxeon star LED's that put out as much as 5 watts.


hope this helps
 
#2
Kobra000 said:

you gotta admit a LED that can put out 51.7 Lumens might be perfect for our projects...only drawback is these things are expensive. go to any search engine and do a search for Luxeon star LED's
Click to expand...

Before others start to reply, I can tell you that those stars have been talked over and over and over... in this forum. Nobody has reported success with it, yet.

51.7 lumens are impressive for these little things. but to match 11,000 lumen of a 250W double ended MH lamp, you need a lot of them and a lot of money.

and it is far away from perfect for our projects. although the spread angle is narrow, but still a array of LEDs is not a paralell light source nor a point light source which could be turned to parrallel by ONE fresnel lens. it's probably useful for smal LCD ( <5" ?) projectors only, at lease for now.
 
#4
Why do all keep nagging about heat (again and again!)? MH is very efficient! Do some math with those leds at the same lumen output! You are generating more with them!
Dont look at temperatures, just look at power consumption. Rated power == heat output (to a very big extend)
If you dont like it hot, take a less powerful bulb, you can get MH in 35W,70W,150W,250W,400W....
 
#5
What is the measuring factor for lights? It seems that a DLP projector of 1500 lumens is enough for a flourescent lit room.

Where as the DIY 11,000 lumens using MH bulb is only mediocre in brightly lit room. Or sometimes it needs to be dimmed even more.
 
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