XML Heat and lumen output

trout

Enlightened
Joined
Nov 29, 2007
Messages
425
Location
yorkshire / England
I have been playing around with an XML led and bike lights and while testing a housing for heat dissipation wondered just how much lumen loss happened as the led warmed up .



this is my little test rig wired up to a power supply



IMG_0184.jpg




so after I had finished the housing monitoring I pointed the light at the wall and set the camera on full manual setting so the aperture and shutter speed stayed the same for each shot



as you see in the pics it is pretty daunting the lumen loss as the temp rises





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