100 lm/W led. From Seoul Semiconductor

FirstDsent

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my (mostly) uninformed opinon:

The basic archetecture of the Luxeon seems to have become the industry standard due to the number of secondary optics and MCPCBs made for the Luxeon. Radiation pattern, pill hight, focal point, dome diameter, etc. all contribute to competitors considerations when trying to compete for a share of the market. That makes them seem similar. Cree inexplicably chose the hard route in my opinion.

Of course, the flashlight market is insignificant to the LED manufacturers, and most of the optics and MCPCBs aren't made specifically for flashlights either. Cree must be vying for a different niche.

Bernie
 

jtr1962

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FirstDsent said:
Of course, the flashlight market is insignificant to the LED manufacturers, and most of the optics and MCPCBs aren't made specifically for flashlights either. Cree must be vying for a different niche.
General lighting is where the big money is going to be made. For that use the new Cree is fine as is. It's even better in a streetlight where you want a wide angle but still somewhat less that a lambertian dispersion. The XR-E can be used with no secondary optics or reflectors in that application. In other words, with 100% fixture efficiency. Compare this to the 60% to 70% fixture efficiency of the current crop of HPS streetlights. This effectively brings the 110 lm/W of HPS down to 65 tp 75 lm/W not even counting lumen depreciation or ballast losses, both of which can be substantial. Given that, the 75 lm/W Cree XR-E beats HPS by a substantial margin. Ditto for most residential lighting applications.
 

Opto-King

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jtr1962 said:
General lighting is where the big money is going to be made. For that use the new Cree is fine as is. It's even better in a streetlight where you want a wide angle but still somewhat less that a lambertian dispersion. The XR-E can be used with no secondary optics or reflectors in that application. In other words, with 100% fixture efficiency. Compare this to the 60% to 70% fixture efficiency of the current crop of HPS streetlights. This effectively brings the 110 lm/W of HPS down to 65 tp 75 lm/W not even counting lumen depreciation or ballast losses, both of which can be substantial. Given that, the 75 lm/W Cree XR-E beats HPS by a substantial margin. Ditto for most residential lighting applications.

You are right, but by using 2nd optics you also get a safer lamp (product) since it is not as dangerous for your eye as an LED it self (due to that the product emitting the light is bigger in size).
 
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