Hi Flocktastic, I'm Linda from Sonora, CA. I have a 250 bulb with a deflector also. One day I checked it and the bulb was hanging onto the silver end cap, which was still screwed in, by a wire. Now for safety I wrap the whole bulb and deflector with small hardware cloth and it's wired on. The bulb can only drop 1/2 inch if it did come loose. I think that's how they start fires, the bulbs get so hot that they separate from the end cap. You'll be able to tell by watching your chicks if they are too hot or not. The red bulb doesn't effect they're eyes like a regular one does I read. As the weather warms change to a smaller wattage.
I always keep 1 TBS. of Braggs organic unpasteurized apple cider vinegar to 1 gal of water to all my chickens. Don't use a metal container for water if you do. I take it myself.
Happy chicken keeping.