I also use a 100w bulb and an 8.5" reflector. I brood inside and the 250w bulb and large reflector are overkill for a small number of chicks. You can usually find the smaller reflector in the hardware department.
I hate to jump in and hijack a thread but where can I get a 100 w red light bulb? I've looked everywhere and can't find one. Is it just a regular red light bulb or is it similar to the wide heat lamp bulbs?
I've been wondering about how the big heat lamps work with the big plastic containers. Does seem that it would get a bit warm. I've been thinking about a coffee can with a 60w bulb inside sitting close to the floor of the brooder...seems I've seen this illustrated somewhere...the chicks simply get close to the can rather than under the can. Also, the box-type hover is interesting....of course I've gotta get the coop built to be able to use one of those.