Using RGB Color-sensor to measure hotspot...

[KreAture]

I got ahold of a RGB color sensor from Hamamatsu.
It's the S9702 with 0.16, 0.23 and 0.18 A/W for R, G and B photodiode.

I did some measurements with some of my torches at 200mm distance and got some interesting numbers. Unfortunately I am not sure how to turn them into something easily comparable to online specs.

Here's a link to a spreadsheet with my first measurements.
It calculates the µW pr color and summed. I know it's probably not a full picture of what the LEDs are putting out but I hope I can use it to see differences as I start to overdrive the LEDs.
http://kreature.dynu.com/files/led-torch.xls

I try to describe each torch as best as I can, but all seem to be rebranded somewhat to the local EE store that sells them.
Their product numbers are in brackets.
Here's links to images of each torch: (Maby this makes it easier to identify some of them.)
cheap LED Torch (36-2996) http://www.clasohlson.no/Archive/Images/Products/Hi/362996_X_2007-08-08_101941_833.jpg
Modified cheap LED Torch (36-2996) same as abowe...
LED Flashlight, 0.5w, 12 lm (36-2380) http://www.clasohlson.no/Archive/Images/Products/Hi/362380_X_2007-06-26_085040_16.jpg
cheap LED Torch 1w (36-2367) http://www.clasohlson.no/Archive/Images/Products/Hi/362367_X_2007-06-26_085037_714.jpg
X-Glow Cree Xlamp 1w, 80 lm (36-3117) http://www.clasohlson.no/Archive/Images/Products/Hi/363117_X_2007-06-26_154125_647.jpg

I'd like to calculate candela or something from theese numbers if I also measure hotspot diameter. (I am not all that interested in the rest of the light output as the hotspot from the torches is all that will carry far, the flood is pretty much useless for that.)

 

[KreAture]

Here's a photo of the emitter in the brightest torch, the 1w Cree.
http://kreature.dynu.com/ee/led/1w_cree_xlamp_torch-emitter.jpg

I removed the star from the metal plate carrier to check and there is no obvious markings underneeth. It was hold on by the 3 clamps on the edges as well as some sort of very weak yellow thermal glue. The star is obviously just stamped out of alu and edges bear very noticable bendings as to which direction force was applied as it was stamped.