CREE Lumia 5 Band Chips?

HockeyBeard

HockeyBeard

Well-Known Member
I was exploring Cutter, and I came across these chips...

http://cutter.com.au/proddetail.php?prod=cut2825

Made me start wondering... How efficient are these chips? Is there any data on that? I know they're pretty pricey, but if their efficiency is halfway decent I was thinking about using them in as the center spot (2-1-2) in lighting configurations with, say, 5000K (can't remember if 5000K or 4000K was most efficient in CXB35) to make up for the lack of red. Think that'd be effective?
 
SilvioBerlusconi said:
I analysed the red Cree XQ-E (basically all red CREE LEDs are nearly the same, so expect comparable results for the XPE2 series) and found out:
P3 Bin (second-best rank) @ 25°C:
0,15A = 49,6%
0,7A = 40,1%
So no, in my eyes it doesn't make sense to add red leds.
Click to expand...
whats your calculation above, are you talking wall plate efficiency ?
 
SilvioBerlusconi said:
I analysed the red Cree XQ-E (basically all red CREE LEDs are nearly the same, so expect comparable results for the XPE2 series) and found out:
P3 Bin (second-best rank) @ 25°C:
0,15A = 49,6%
0,7A = 40,1%
So no, in my eyes it doesn't make sense to add red leds.
Click to expand...

so, I'd imagine you don't have to drive these 5 channels very hard to get the necessary saturation of red. I know I'd have 730nm really really low (unless of course, someone good with arduino could program it as a lights out, as opposed to the floods on the market).. So, let's say I'm running them on a 0.7mA on a dimmer, maybe only using half that... The added, what, 35W per 2x2 @ 42%ish isn't worth filling in the gaps of an already very efficient 4000K setup? It would not show enough tangible benefit to justify the expenditure?
 
Or maybe it wouldn't blend properly? I'm no expert in how these mix, and am having a hard time envisioning a setup without coverage gaps
 
SilvioBerlusconi said:
I analysed the red Cree XQ-E (basically all red CREE LEDs are nearly the same, so expect comparable results for the XPE2 series) and found out:
P3 Bin (second-best rank) @ 25°C:
0,15A = 49,6%
0,7A = 40,1%
So no, in my eyes it doesn't make sense to add red leds.
Click to expand...
So LER about 210lm/W, right? I came up with ~182lm/W.
 
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