The polished aluminum surface inside the dome increases UVB and UVA output to domes with interior white surfaces.;100 watt max;Deep Dome Clamp Lamp is specifically designed to accomodateﾃδづつlarger or longerﾃδづつbulbs,ﾃδづつsuch asﾃδづつFlukerﾃδ｢ﾃ｢ﾂつｬTMs Sun-Glow and Sun Spot bulbs