1. Yes, you need a heat lamp. If you brood indoors, you do NOT need a 250 watt. I use 100 watt regular house light bulbs and brood in decent sized Rubbermaid tubs., Do not try to find a way to avoid using heat lamps unless you live in a 90 degree house. You will end up with dead chicks and wasted money.
2. Heat lamp safety is not very complex. Have nothing burn/meltable touching ANY part of the lamp/lamp guard and reflector. Have the bulb at least 12 inches away from the bedding. Use safe electric cords/extension cords. Make sure the bulb cannot slide/fall off onto any flammable surface, including into the brooder.
3. I feel a bit uncomfortable with advising you how to brood chicks at all, because I noticed in your previous pictures, you appear to keep several rooster in what appears to be a basement/garage with a string tying their leg to a pipe a VERY short distance away. This is not good chicken husbandry at all and makes me think you are keeping them for reasons that are not in the birds' best interest. :/
