[XXShadowXX]

gyms and arenas can be lite with (depending on age) very harsh lights;

that are not fluorescent, if these have are made like standard bulbs, with filliment (excuse spelling) then they would throw alot of infared

or carbon arc lamps (these were phased out) but some places still use them, these are lite with a arc of electrons jumping between the carbon poles, this would be an infared nightmare (radates all the way across the spectrum from radio to light, but mainly concetrated in the infared to light wave lenght i think).

best test i think would be take a million candle power flash light, and 5 other remotes and have them all send interference, if you can get a single throught that then your cooking with gas!