Choosing and replacing lamps and bulbs in your grow room should be a regular part of your routine. Higher end lamps have a life expectancy of up to two years (10,000+ hours) before they begin to degrade significantly in light output. Cheaper lamps need to be changed each grow cycle in order to maintain optimal par output. Lamps come in many forms including DE (Double Ended) & SE (Single Ended) in MH (Metal Halide) & HPS (High Pressure Sodium). CMH (Ceramic Metal Halide), Fluorescent T-5, T-8 & T-12 bulbs (blue 6500k & red 2700 k kelvin), HID (High Intensity Discharge), Induction light bulbs, CFL (Compact Fluorescent), LEC (Light Emitting Ceramic) and more! Lights range in wattage from 150 watts, 250w, 400w, 430w, 600w, 750w, 1000w, 1125w, 1215w & 1500 watt! We have grow lamps and light bulbs for grow lights of all makes and sizes.