I believe hot spots can only be caused by HID's. I've had them. There is a diffuser out thats about $30. I plan to use one next time to evaluate. As for definition??? I guess I'd say it's a spot where the plant receives too much light concentrated on a small area. You would probably only see this with 1000 watters.
grey1223 Reviewed by grey1223 on . Hot Spots??.................... I see these mentioned all the time but cant find a defention. can they be a problem with low temp CFL lightbulbs? My walmart emergency blanket is NO WHERE near flat against my walls. Couldnt find mylar in my area. Thanks~! Rating: 5