The Philips Family of Standard Frost and Clear bulbs are good for everyday use. Clear bulbs provide sparkle, especially in fixtures that are made of chrome, have mirrored surfaces,multiple sockets or have cut glass parts. If glare is a problem, use a dimmer or a lower wattage bulb to reduce brightness. Clear bulbs are also used in fixtures with reflectors. Frost bulbs provide soft light with reduced glare. 150W Med 130V A21 CL CSA 1SL. Base: Medium [Single Contact Medium Screw] - Bulb: A21 - Bulb Finish: Clear - Filament Shape: CC-8 [Axial] - Operating Position: Universal [Any or Universal (U)] - Energy Used: 150 W - Voltage: 130 V