Sunblaster 200w CFL Available in 2700k, 6400k, and 25,000k Use the 200 watt compact fluorescent bulbs to replace your existing 250-300 watt regular bulbs, where ever you want to provide full spectrum 6400 Kelvin cool natural light which is comparable to natural daylight. These bulbs work well in warehouse lighting and horticultural applications as well. Use 6400K for growth & 2700K for budding or flowering stages, when used in horticultural applications.