Does anyone know what brand leds opalec uses and what ranks the are... I own three and one is not as bright as the other two, I was just wondering what the spec they require are.
I don't think Opalec lists a particular kind, brand or rank of LED as a specification for their product, since availability varies and they may need to change from time to time. However, the ones I have seen appear to be of the highest quality LEDs.
However, if you are not satisfied with one of yours, maybe you should contact Opalec and see if they can solve your problem.