I use the ZooMed LARGE DEEP DOME light fixture. I really like it because the bulb is recessed inside, thus is protected. Also it comes with a hook to hang it. A mercury vapor bulb has to be hung so it is straight up and down and not at an angle which shortens the life of the bulb. I also use the ZooMed LARGE LIGHT STAND to hang my lights. The stand can be adjusted up and down to obtain the correct temperature. I buy mine either from Petmountain.com or Amazon.com which ever place has the best price.