LED T8 alternative to fluorescent T5 and T8 grow lgihts. 22w per bulb. T8 red is 660nm red wavelength. Lifetime of 50,000 hours. Use only in Agro LED fixtures--bulbs are self-ballasted. 22 watt 4' T8 size LED lamp. For use in AgroLED™ fixtures by Sun System®. 120 volt. Self-ballasted - No separate ballast required. Not for retro fitting existing T8 fluorescent fixtures. Lamp lifetime is over 50,000 hours. Flicker-free operation with instant illumination. T8 LED tube Red has 288 red LED's. The T8 LED White/Blue tube has 144 blue and 144 white LED's. No fragile glass. Energy efficient. Cool operation allows closer placement to plants. Environmentally friendly. 1 year warranty.