4 pcs- 600 Watt HPS Grow Bulb for Grow Lamps. By Motor City Home Products. EXTENDS GROWING SEASON: This 600 watt HPS spectrum light bulb raises your lighting system to a whole new level of high performance.Developed to provide optimum spectral energy levels for indoor horticulture. LONGER LIFETIME: Lasts up to 24,000 hours with a high lumen output and low energy consumption. Provides 15% more available energy for plant growth than a normal HPS bulb. PLUS bulbs promote vigorous and healthy plants for higher yields! PRECISELY CONFIGURED BY MOTOR CITY HOME PRODUCTS: A HOMEREV Exclusive Brand. Sale is for 4 bulbs for one low price. The item "4 pcs- 600 Watt HPS Grow Bulbs for Grow Lamps" is in sale since Tuesday, August 8, 2017. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Hydroponics & Seed Starting\Grow Light Bulbs". The seller is "merchandisemecca" and is located in Farmington, Michigan. This item can be shipped to United States.