Manfacturer: Duro-Test Corp.
This Duro-Test 750 watt self ballasted mercury vapor lamp is called a semi-reflector because it has internal phosphor coating on the neck, and no aluminumized reflective material. Although it has a frosted face which allows a lot of downlight, the phosphored neck also allows a lot of uplight, so a fixture is still required to control the light from straying too broad. While this lamp is fairly recent, its design has roots dating back to the 1950s, including the ballast filament design (two C-8s in series).
Lamp: Self Ballasted Mercury Vapor
Wattage: 750 watt
Voltage: 230 volts
Ballast Type: No Ballast Required
Color Temperature: 3300 degrees K
CRI: 50
Light Output: 23,000 Lumens
Bulb: R-57 Hard Glass
Finish: Deluxe White
Base: E-39s Nickel Plated Mogul Base
Class: -
Filament: -
Lamp Life: 18,000 hours
Manf. Date: c. 1990s
Country of
Orgin: USA
