FOr what it's worth, I have one bulb in a 8x6 ccop and the girls can hide from the light by sleeping away from the bulb. I'm still experimenting to see if changing the location and the number of bulbs ( relative to the perches) will increase the laying rate. I"m using a 60 watt bulb but only getting about 12 eggs a day from 30 hens . . . . this isn't conclusive but I"m thinking location, location, location.
Hi Arielle! One bulb is more than enough for that much space. Depending on when you turned the bulb ob, it can take a solid month before the increase occurs because the light triggers hormones to which the body need respond before the lay begins. Also, it's a specific amount of light, a lot of folks just turn on a light execting results, but there's a method to it.