Philips Ceramalux lamps provide efficient lighting solutions for industrial applications, warehouses, post top applications and parking lots. Ceramalux 100W Med BD17 CL. Base: Medium [Single Contact Medium Screw] - Base Information: Brass [Brass Base] - Bulb: BD17 - Bulb Material: Hard Glass - Bulb Finish: Clear - Operating Position: Universal [Any or Universal (U)] - Color Rendering Index: 21 Ra8 - Design Mean Lumens: 8550 Lm - Watts: 100 W - Lamp Voltage: 55 V - Lamp Current: 2.1 A - Ignition Time: 5 (max) s - Mercury (Hg) Content: 22 (max) mg.