Standard BL 1400Lm Electronic 120 277V Fluorescent Emergency Ballast For (1 2) 2 8 Foot T12 HO Or VHO T8 HO 20W 40W Circline 13W 55W Compact Fluorescent Time Delay Test Switch (BAL1400TD) backorder1020 Sylvania M250UED28 250W ED28 Probe CDLED6WD 26W 50D935 W Sylvania M250UED28 250W ED28 Probe Start Metal Halide 4200K Mogul E39 Base Clear Bulb M58 E (64032) GE MVR1000 U BT37 1000W BT37 Probe Start Metal Halide 3700K Mogul E39 Base Clear Bulb M47 E (18205) Standard BL 1400Lm Electronic 120 277V Fluorescent Emergency Ballast For (1 2) 2 8 Foot T12 HO Or VHO T8 HO 20W 40W Circline 13W 55W Compact Fluorescent Time Delay Test Switch (BAL1400TD) this 120 277V electronic ballast ensures reliable performance for (1 2) 2 8 foot T12 HO or VHO T8 HO 20W 40W Circline 13W 55W Compact Fluorescent bulbs