Crompton Lamps HID Tubular 400W E40 MER/SON Cool White Clear

Upgrade your mercury and orange sodium (SON) tubular light bulbs to bright, crisp white light with these metal halide retro-fits. Able to operate off of both mercury and SON control gear, these HID light bulbs are the easy, confusion-free way to replace your old light bulbs. Fitted with a GES-E40 Goliath Edison screw (40mm) cap (sometimes known as a giant screw cap).

Price: 25.19 from Lightbulbs Direct