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.

Philips Mercury Vapor Lamp, HID, H33GL-400/DX Full CT 6PK Designation, 400 W Wattage, 366 VAC, 3 A, E39 Mogul Lamp Base, ED37 Shape, 23000 Lumens, 24000 hr Average Life, Cool White, 90 CRI, 3700 K Color Temperature, Coated Lamp, H33 Ballast, 122 mm W x 290 mm H Dimensions

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• Universal operating position
• 53 LPW luminous efficiency
• Hard glass bulb
• 350 deg C bulb temperature
• 210 deg C base temperature
• 72 mg mercury content
• Low initial cost, but have higher operating costs than HPS or metal halide due to its lower efficiency
• 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
• 130 to 150 VAC voltage rating
• Not affected by epact