SolarMax lamps are specifically designed for sophisticated horticultural applications. ISO certified engineering and manufacturing processes ensure high-quality and optimized performance. All Metal Halide bulbs have a kelvin rating of 7200º. SolarMax Gold are similar to a 3000º. Kelvin light source, these lamps are excellent for fruiting/flowering applications and because they are Metal Halides lamps they have enough full spectrum energy for all a plants needs from 380 to 760 nanometers. Produces 85,000 Lumens.