Ushio energy efficient T-8 bulbs reduce energy consumption up to 40% compared to T-12 fluorescent bulbs with the same light output. Cooler, 1/2 the price, and use less energy than T5 lamps. Available in 3000° Kelvin for flowering, 4100° Kelvin for vegetative growth, 5000° Kelvin for enhanced vegetative growth, and Full Spectrum 6000° Kelvin. Mix 3000° Kelvin and 5000° Kelvin for full spectrum lighting. Operate on a T-8 instant start electronic ballast. Made in Germany

You can mix 3000, 4100, and 5000 Kelvin temperatures in our 4-packs. Include a note with your order. 6000K cannot be mixed.