> Thank you for your replies to my question thus far. Advise me on the > following by choosing the most correct answer. I think it is [2] or [3]. > > If I have two LEDs that are radiating each other from a distance of approx. > 1mm and both are driven by current sources, then: > 1. The diodes will become unstable > 2. Electrical power to diodes will increase > 3. Voltage across diodes will increase > 4. Light output of both diodes will increase > 5. Light output of both diodes will decrease I admit that I don't actually know this answer, but I suspect that you won't see much of any measurable difference to a first approximation. Of course if you really want to know, don't ask, do it! I'd like to hear the answer when you find out. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.