Gee, unless your coop is made of tinfoil or soemthing like that, a 150w bulb would make it *awfully* toasty in there. Also being a fire hazard.
I would suggest three things.
1) read my "cold coop" page (link in .sig below) and maybe some other BYC threads about chickens and cold, to educate yourself about what chickens do well with.
2) buy a max-min thermometer and mount it in the coop next to the roost, and get in the habit of checking and resetting it every morning so you can get a sense of what your actual coop temps are.
3) Turn off the lightbulb for now, unless you live in Nome, Alaska you're unlikely to need it; and when-and-if you DO think (based on chicken behavior and health) you may need to add heat, start with like a 40w bulb and see if that's enough. (If it's not, try a 60w, etc). Using as low wattage as possible is not only financially sensible, it is also much SAFER. ANd you may well find you don't need to add any heat anyhow.
Good luck, have fun,
Pat
I would suggest three things.
1) read my "cold coop" page (link in .sig below) and maybe some other BYC threads about chickens and cold, to educate yourself about what chickens do well with.
2) buy a max-min thermometer and mount it in the coop next to the roost, and get in the habit of checking and resetting it every morning so you can get a sense of what your actual coop temps are.
3) Turn off the lightbulb for now, unless you live in Nome, Alaska you're unlikely to need it; and when-and-if you DO think (based on chicken behavior and health) you may need to add heat, start with like a 40w bulb and see if that's enough. (If it's not, try a 60w, etc). Using as low wattage as possible is not only financially sensible, it is also much SAFER. ANd you may well find you don't need to add any heat anyhow.
Good luck, have fun,
Pat