FeaturesUniversal operating position53 LPW luminous efficiencyHard glass bulb350 deg C bulb temperature210 deg C base temperature72 mg mercury contentLow initial cost, but have higher operating costs than HPS or metal halide Due to its lower efficiencyClear mercury bulb has a bluish green appearance and the Deluxe white has a higher color renderingMercury lamps get dimmer over time and rarely burn out, so it is wise to replace them and restore light level130 to 150 VAC voltage ratingNot affected by epact