Apollo Horticulture Purple Reign 6W A19 Green LED Light Bulb 1 - Apollo Horticulture 6W A19 Green LED Bulb Dimensions: 4" Height, 2" Diameter / LED Wavelength: 513nm Light the way - no more blindly stumbling around your dark grow room Retain optimal photosynthesis - green light does not interfere with your grows Plug-and-play - fits standard E27 sockets for easy installation, no special hardware necessary