The Mega-Ray Mercury Vapor Bulb is a best-in-class self-ballasted basking spot lamp that creates superior levels of UVA and UVB light.

• Self-ballasted mercury vapor bulb.
• For 10 years, it has been shown to have the longest lasting UVB production of any other mercury vapor bulbs available.
• Promotes the synthesis of Vitamin D3 and prevents metabolic bone disease.
• Produces similar amounts of UVB to natural sunlight.
• 100 Watt Bulb - MINIMUM distance setting of 12" will produce approximately 150-200 microwatts per square centimeter(uW/cm2) of UVB and 900-1200uW/cm2 of UVA. MAXIMUM distance setting of 20" will produce 50-70 microwatts per square centimeter (uW/cm2) of UVB. (Distnace us measured from lamp face to basking spot or reptile for optimum UVB and heat.)