You can also try to shine the light on the ceiling in a dark room, making sure not to look directly at the ceiling or the light source, and comparing how well the room is lit up. You should be able to see some difference with a digicam too. Perhaps someone can chime in as to whether or not they make 0.9mm^2 R2 dice yet or if they are all still 1mm^2 dice.
Ooooh! I've got a new LED on my wishlist ;-)
Thanks, JacobJones!
Hallo,
i've ordered a 'CREE XR-E 7090 R2' on star pcb from a small retailer. How can i make sure its a genuine R2 and not a Q5 or something similar?