I'm a fan of powersun MVB. Longer lasting, and they provide the needed basking temps while supplying the uv. For my sulcata, I like a basking spot of 100-105. Mine are mounted in ceramic sockets and I replace the wire with a heavier duty cord. Also I wrap a piece of wire coat hanger around the base of the power cord where it joins the socket to keep it from moving. The heat will often cause the cord to become brittle and stabilizing it helps prevent it from decaying too fast.