HPS grow lights

250W MH/HPS grow light Coverage Area: 2′ x 2′ (0.6m x 0.6m) up to 2.5′ x 2.5′ (0.8m x 0.8m) How Far From Plants? Keep 10+ inches (25cm) away from tops of plants Average Yields: 125 – 250 g (4 – 8 ounces) – less for beginners, more for the pros – get the biggest yields by filling the entire grow area with a wide even canopy and remember that the strain (genetics) you grow with also makes a huge difference in your final yields Notes: Some (but not all) 250W MH/HPS have a “Built-In Ballast,” which means everything is actually attached together and you just plug the light directly into the wall. Some 250W HPS lights have a traditional ballast, which means that the ballast is a separate piece from the hood/reflector. In general, it’s better to get a light where the reflector is separate from the ballast – they are more efficient, cooler, and spread their light over a bigger area. 400W MH/HPS  grow light Coverage Area: 3′ x 3′ (0.9m x 0.9m) up to 3.5′ x 3.5′ (1m x 1m) How Far Fr...