T8 L.E.D. Tube light, 18 Watt, 4 foot, G13 end caps, CE and Rohs listed. Long life up to 30,000 hours or longer. Great to save power and user LED tube lights. Please make sure to remove ballast. This grow light saves energy. Apply power to both ends. 120 degree viewing angle. Up to 1800 lumen output. Great for vegatative and flowering growth. Viewing angle 120 degrees. This LED grow light is not dim-able. These are the T8 tubes only. You need to have a T8 fixture with G13 tombstones. Some wiring will be required to bypass the built in ballast and to make sure the voltage is applied to the tube as shown in the drawings. The voltage is wide operating voltage from 90 VAC to 220 VAC. The CRI > 72. The RA > 72. LED Color:red,blue,white, Red:620-630 and Blue: 460-470. Operates 50/60 Hz. The color ration is 5 red LEDs to 1 blue LED.