I don't know how big your biggest bin is but I'd use the biggest. If you brood in your laundry room a very small wattage bulb should work, 60 to 75 watts,, assuming you have climate control and the temperature stays pretty constant in there. Do not use the clamp that comes with the heat lamp, throw it away so you are not tempted to use it. Use wire to hang it so it cannot possibly fall down. Do not use plastic or string that can melt or burn, use wire. If you brood in the car port you will have bigger temperature swings. I'd probably go with a larger wattage bulb, maybe a 125.
Hang the lamp over one end of the bin. You are only trying to heat a small area, not the whole thing. You want the far end to be quite a bit cooler. The check the temperature under the heat lamp at the time it's pretty cool. If it is 90 to 95 degrees at floor level, perfect. You don't want it much warmer than that. You can raise or lower the lamp to adjust the temperature. Then check the temperature in the cool area of the brooder. Hopefully it is several degrees cooler. If not you may need to put up a barrier to give hem something they can hide behind to protect them from the heat lamp.
The only ventilation you'll have is the open top but in a short while they will be able to fly out of that bin, their wing feathers come in that fast. You probably need to fashion a top for that bin out of chicken wire or hardware cloth to keep them from flying out. Don't use plastic netting, the lamp might melt it.
If you haven't bought the heat lamp yet you might consider a heating pad cave, maybe @azygous or @lazy gardener can help you with which one to buy and how to set it up. Certain pads work and certain ones don't. A heat plate like Brinsea has would also work and probably be the easiest to set up, but they may be a bit expensive. I have not priced one.
Hang the lamp over one end of the bin. You are only trying to heat a small area, not the whole thing. You want the far end to be quite a bit cooler. The check the temperature under the heat lamp at the time it's pretty cool. If it is 90 to 95 degrees at floor level, perfect. You don't want it much warmer than that. You can raise or lower the lamp to adjust the temperature. Then check the temperature in the cool area of the brooder. Hopefully it is several degrees cooler. If not you may need to put up a barrier to give hem something they can hide behind to protect them from the heat lamp.
The only ventilation you'll have is the open top but in a short while they will be able to fly out of that bin, their wing feathers come in that fast. You probably need to fashion a top for that bin out of chicken wire or hardware cloth to keep them from flying out. Don't use plastic netting, the lamp might melt it.
If you haven't bought the heat lamp yet you might consider a heating pad cave, maybe @azygous or @lazy gardener can help you with which one to buy and how to set it up. Certain pads work and certain ones don't. A heat plate like Brinsea has would also work and probably be the easiest to set up, but they may be a bit expensive. I have not priced one.
