Ice Cap Electronic Ballasts produce little heat and operate T5 lamps 50% brighter. Their unique circuitry prevents premature lamp burn out and fading associated with other T5 HO Ballast. You can operate VHO and HO lamps at the same time in any lamp combination. A Model 660 Electronic Ballast can operate up to 16 feet of lamp with a total of 440 rated lamp watts. 3 Year Limited Warranty. Retro Kit Includes: 4 Pairs T5 Endcaps, 4 Pairs T5 Standoffs, 4 SLR IceCap Reflectors and their mounting hardware, 1 Power Cord (Grounded), Wire Nuts, and 1 IceCap 660 Electronic Fluorescent Ballast Lamp ordering. In the suggestion box during check out please indicate your choice of lamps needed found in the T5 Lamp section.