| PFO 400 Watt Dual Metal Halide Ballast | $152.50 |
| EIKO 400&150 watt HPS HID Grow Light Ballast Bulbs | $4.25 |
| Wired 400 Watt Metal Halide Ballast Used | $40.00 |
| 400 metal halide, ballast, socket, free lamp, M59 120V | $22.99 |
| Ballast, 400 W bulb and Four sided reflector | $57.00 |
| 400 Watt HPS Ballast Kit with Reflector, and 2 Bulbs | $74.00 |
| 400 HPS HORTICULTURAL GROW LIGHT 120/240 BALLAST | $56.52 |
| 400 WATT METAL HALIDE BALLAST | $36.55 |
| 400 Watt Digital Electronic Ballast MH/HPS 120V | $66.00 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $32.50 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $31.50 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $31.50 |
| NEW SYLVANIA 400 WATT METAL HALIDE BALLAST KIT | $31.50 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $31.50 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $31.50 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $31.50 |
| NEW SYLVANIA 400 WATT HIGH PRESSURE SODIUM BALLAST KIT | $31.50 |
| HTG 400 Watt HPS Ballast with Socket | $108.50 |
| Metrolight SuperHID 400 HPS ELECTRONIC BALLAST | $5.95 |
| ***400 watt ICECAP BALLAST LESS THAN A YR RUN TIME | $90.00 |
| High Bay 400 watt Light fixtures W/lamp and ballast | $4.00 |
| DIGITAL 400 watt GROW LIGHT KIT ballast reflector bulb! | $186.50 |
| New Advance Ballast Metal Halide Kit 400 W 71A6051-001D | $39.99 |