LED Calculations
Triple Cree XRE Q5 at 1000ma
Min 107 x
2.25 x 3 x 0.92 = 664.47
Max 114 x
2.25 x 3 x 0.92 = 707.94
Triple Cree XRE R2 at 1000ma
Min 114 x
2.25 x 3 x 0.92 = 707.94
Max 121 x
2.25 x 3 x 0.92 = 751.41
Quad Cree XRE R2 at 1000ma
Min 114 x
2.25 x 4 x 0.92 = 943.92
Max 121 x
2.25 x 4 x 0.92 = 1001.88
Explanation.
Cree XRE
R2 LED generates 114-121 Lumens.
The LED
lumen output is not linear and slightly decreases as the current
increases thus 2.25@1000ma not 2.86 as I previously thought.
Multiply
by the number of LEDs
0.92 is
the efficiency of the optic. (92% transmission)
|
Lumen8r-10W
~550
Lumens |
Lumen8r-LED
Triple Cree R2
~720
Lumens |
Prototype
Quad Cree R2
~1000
lumens |
|
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