Nobody likes a copy-cat, unless we're talking about the Sunleaves OptiLUME HPS, 400W, U Lamp ED-18. This is a lamp that emulates natural sunlight, which is great because its concentration of red-orange light enhances flower, fruit, and vegetable production. The Sunleaves OptiLUME HPS, 400W, U Lamp ED-18 is a universal design lamp, which means it can be operated both horizontally or vertically. This baby emits a whopping 50,000 lumens and has a 24,000-hour life rating. THe Sunleaves OptiLUME HPS, 400W, U Lamp ED-18 works on most 400-watt High Pressure Sodium (HPS) and two-way HID lighting rigs.