Arcadia ShadeDweller UV Lamp 8w. Perfect for use with crepuscular species including the Leopard Gecko, Crested Gecko, many Amphibians and Invertebrates. Also, many diurnal species of snake that can easily climb to regulate their own level of exposure in shallow vivaria such as Corn, King, Milk and Rat Snakes. The T5 lamp is specifically designed for shade dwelling (crepuscular) species whilst also being suitable for many diurnal species living in shallow enclosures. Full-spectrum lamp, featuring 7% UV-B for the synthesis of vitamin D3 whilst also producing a targeted flood of UV enabling the keeper to set a photo-gradient. Lamp wattage 8w, length 300mm, diameter T5 16mm, lumens 400lm. Output: UV-B 7%, UV-A 17%, Kelvin 6000K, CRI 90>. Ultra-Violet Index (UVI): distance 250mm 0.80, 300mm 0.65, 375mm 0.45, 450mm 0.30. Energy efficiency rating A. kWh/1000h* 9.