Very Large 28W 4 Pin CFL Light Bulb - 2000 Lumens Warm White (DD Square)
Very Large 28W 4 Pin CFL Light Bulb. Why Choose Our 28W 4 Pin CFL Light Bulb?. Power & Compatibility: Requires a 4 pin ballast with a power greater than 28W to function properly - note that standard 2 pin ballasts are not compatible.