GE Vio LED

[divine]

Has anyone seen this LED from GE?

It seems a little large for a flashlight, ~1 inch square, and the forward voltage is a little high, but it looks promising.

http://www.lumination.com/product.php?id=56

 

[JohnR66]

High CRI and low color temps, large size seem to make it a fixed lighting product. Low Luxeon 1 range lumen per watts is disappointing. typical CFL is in the 60 lpw range and linear fluoro. tubes can reach over 90 lpw.

Perhaps good for specialized lighting applications such as under cabinet lights, but the efficiency must improve before it can be accepted as a mainstream lighting source.

 

[Gryloc]

It is nice that we have another LED manufacture, even if it may not affect us because of their specialized market. I wonder who makes their dies. I could not imagine GE making their own dies. Even if it is not the most efficient emitter, it is still a good sight. These would be great to use in desklamps or other unique lighting types that were difficult or bulky to use with fluorescents, but required more efficiency than incandescents. Is there any high CRI and low color temperature LED emitters that have a better efficiency with the output of GE's 4W emitter? How would they compare to the warm white MC-E emitters (especially with CRI)? I think it is refreshing to see.

I am glad to see that GE was thourogh when providing specs for their LED. I wonder how this emitter fares with secondary optics (180 degrees to 50%). Even though the dome is large, the point source may be small (think of the SSC P7). Their 4W model has just three of the 1W dies in series. That could make the electrical design simpler when you need a cluster of these LED emitters. These could be useful then for 12V desklamps or for interior lighting in cars. Even though these models are not very exciting, what about the future? GE is really dedicated on providing more efficient fixtures out there, and LEDs are not going away any time soon.

-Tony

 

[tebore]

This LED was posted about a while back. I don't know where the thread is.

Maybe it's just me, but the lm/w is low the CRI is nothing amazing and the color temps also aren't new. Seems like the Cree LEDs beat it in everyway. Then you got the SSC high CRI.

 

[purduephotog]

This LED was posted about a while back. I don't know where the thread is.

Maybe it's just me, but the lm/w is low the CRI is nothing amazing and the color temps also aren't new. Seems like the Cree LEDs beat it in everyway. Then you got the SSC high CRI.

I've been spending quite a bit of time researching this LED for my work. I've ordered some to evaluate, but here's what I can tell you about my current research...

The VIO dome is glass- not silicone- so I don't expect to get it all gummed up. It contains a Tb port- and all the stats are based on the temperature of the board, not at the impossible-to-measure junction temperature. The DOE has praised GE for this measurement- I'm surprised CREE doesn't do something similar yet.

Given that the VIO is violet and phosphor'ed to warm instead of blue it'll never be in the same market as the CREE. I've got a number of cree's lined up to evaluate at work and see how this works in pricing.

Also they use multi dies to get their higher wattages instead of higher drive currents. If I do my math right a 40 watt 'bulb' with an Xitanium driver would be 120$ for LEDs + 45$ driver= 165$. That's not bad at all. That would be 5 strings of 2x 3.6/4watt LEDs for a total of 10 LEDs (1750ma/5 = 350 = rated drive current).

I haven't discussed overdriving the units at all- but their specs are pretty robust- so long as you don't exceed the maximum Tb(Temperature board) then they're rated for 50K hours. I like that.

Anyway... soon as I get stuff running I'll let you know. I may want to do a group buy if there's enough interest.