HQRP 7W Grow Light Bulb 7 Spot Red 660nm LED E26 E27 Medium Base for Indoor Garden Hydroponic Plant growing + UV Meter HQRP&reg; LED Spot Plant Grow Light plus HQRP&reg; UV Chain / UV Health Meter; 7 Red LED Light (660 nm wavelength); Bulb: E26 E27 Base; Aluminum body of bulb; 7 Watts, Working Voltage: 90V to 260V; Dimensions: L - 4 1/4", D - 2 1/8"; Common screw E26 E27 base for common holder, easy to install; 200 days warranty.