Bright lights isn't usually a problem. Lots of IR (sunlight, incandescent bulbs) or lots of light with a frequency component (early CFL, some LED bulbs) are often an issue. (I know - that doesn't leave many options ... :-) ) I have a specific lamp in my family room that must be turned off to use the remote controls for the TV, etc. Somewhere on my list of "get around to it" I was planning on setting up a receiver and examining the output of the bulb just to satisfy my curiosity. I suspect that it's internal switch mode converter is hitting a harmonic of the remote's modulation frequency. On Mon, Oct 17, 2016 at 7:49 PM, Neil wrote: > The ceiling is an unknown, and may be very high. But I can raise the > emitters a couple feet higher to reduce the angular difference. I'll > find out for sure on Frida, and also find out if there are any really > bright lights I need to worry about. > > Thanks, > -Neil.. > > > > > On 10/17/2016 2:58 PM, Van Horn, David wrote: > > More transmitters driven at the same moment is better. No phase issues= , > the wavelength around 800nm > > You could bounce them off the ceiling of the room for more dispersion. > > > > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .