315 OMEGA BALLAST with daylight 4000k (grow) bulb and euro reflector. We have found that a separate ballast and reflector is easier to adjust and keeps the heat from the ballast outside of the grow area. Also available with 3000k (flower) bulb. We tested this system for light output against the more expensive 315 systems on the market and the light output was identical.The 315 system uses the latest technology to produces a light spectrum more like the sun giving better weight and far superior plant quality than the old sodium systems. This system only produces half the heat of a 600 sodium which makes it a lot easier to keep the grow room temperature down in the hot summer months. A high quality lighting system for high quality results. The item "315 WATT CDM CMH OMEGA 4k GROW LIGHT full system NOT maxibright daylight 315" is in sale since Wednesday, May 1, 2019. This item is in the category "Garden & Patio\Hydroponics & Seed Starting\Grow Light Kits". The seller is "gogrow612013" and is located in Chesterfield. This item can be shipped to United Kingdom.