Replacement Lamps Assorted wattages and bulb types available to choose from. Mercury Vapor lamps feature low initial cost, but have higher operating costs than HPS or Metal Halide due to its lower efficiency. The clear mercury bulb has a bluish green appearance and the Deluxe White has a higher color rendering. Mercury lamps get dimmer over time and rarely burn out, so it is wise to replace them and restore light level. Life = +24,000 hours.;CRI = Clear 20, Deluxe White 45.;Color Temperature = Cool.;Efficiency50 Lumens per watt.;Available in 50, 75, 100, 175, 250, 400 and 1000 watts. Multiple choices of bulbs types available. Ideal for landscape lighting, dusk to dawn fixtures, roadway, parking lots, floodlight, and security.