The Sylvania H33GL-400/DX is a 400W Mercury Vapor HID lamp designed for general lighting applications where good efficiency, long service life, and moderate color rendering are required. Featuring a rugged ED37 bulb shape with a phosphor-coated deluxe white finish, this lamp delivers 23,000 initial lumens at a neutral 4000K color temperature, producing a bright, balanced white light well suited to commercial, industrial, and outdoor environments.

Built with a mogul E39 screw base and carrying ANSI code H33, this Mercury Vapor lamp is engineered for use in O-type fixtures and supports universal burn position for flexible installation in a wide range of luminaires. The deluxe white phosphor coating improves color rendering to a CRI of 43, softening the characteristic blue-green appearance of clear mercury lamps and producing a more natural white output for occupied spaces.

With a rated average life of 24,000 hours, this Sylvania Mercury Vapor lamp reduces relamping frequency in hard-to-reach installations such as parking lots, roadways, security lighting, outdoor facades, warehouses, and industrial high-bay fixtures. Its 11.5-inch maximum overall length and 4.5-inch diameter conform to standard ED37 dimensions, ensuring compatibility with legacy HID fixtures originally specified for 400W mercury vapor service.

• 400W Mercury Vapor HID lamp with ED37 bulb shape and phosphor-coated deluxe white finish for improved color rendering
• Produces 23,000 initial lumens at 4000K neutral white color temperature with a CRI of 43
• E39 mogul screw base with ANSI code H33 for use in compatible O-type mercury vapor fixtures
• Long 24,000 hour average rated life reduces maintenance and relamping in hard-to-access locations
• Universal burn position supports flexible installation in a wide range of HID luminaires
• Ideal for commercial, industrial, parking lot, street, security, and outdoor facade lighting applications

Tags: H33GL-400/DX, Sylvania, Mercury Vapor, Coated, 69450