Mercury Vapor lamps feature low initial cost, but have higher operating costs than HPS or Metal Halide due to its lower efficiency. The Deluxe White mercury bulb has a higher color rendering than clear mercury bulbs. Mercury lamps get dimmer over time and rarely burn out, so it is wise to replace them and restore light level.
Rated 5 out of 5 High Quality Bulbs
I installed four of these bulbs in early 2010 and they appear to be as bright as when they were first installed. They are on every night from dusk until dawn.
January 13, 2012