Download - Grandlite HID Luminaires
HID LuminaireBasics
September 19, 2014
How it works
Electric arc passing through a gas between two electrodes produces light
Quartz metal halide lamp
Typical uses:• Sports fields• Parking Lots• Airports• Construction lights
Quartz metal halide lamp
• 50 to 1500 watts• 1,500 to 150,000 lumens
(maintained)• Both pulse start and probe
start• E26 or E39 base
depending on wattage• Probe start mean lifetime
6,000 to 10,000 hours• Pulse start mean lifetime
12,000 to 30,000 hours
Metal halide lumen depreciation
Probe start vs. pulse start
Warm-up and restrike
Quartz metal halide ballast
• Includes coil and capacitor. Pulse-start includes igniter.• Probe start ballasts available in multitap, multitap with 480, or 480 only.• Pulse start multitap is standard.
Probe start ballast wiring
Pulse start & HPS ballast wiring
High pressure sodium lamp
Typical usage:• Roadways
High pressure sodium lamp
• 50 to 1000 watts• 3000 to 125,000 lumens
(maintained)• E26 or E39 base
depending on wattage• Mean lifetime 12,000 to
24,000 hours
High pressure sodium ballast
• Includes coil, capacitor, and igniter• Available with or without multitap input (120/208/240/277)
HID backup ballast
• Activates when power to luminaire is cut off or sags• Catches and maintains arc for a few minutes until power is restored.• Normally installed external to the fixture.
“Quartz restrike” emergency lighting
• Activates when the HID lamp arc is extinguished• Current-sensing switch powers up a small backup quartz halogen lamp• Can run off emergency power generator
Battery backup emergency lighting
• Activates when the AC line power is lost• Emergency ballast with integrated batter powers up a small backup fluorescent lamp• Lasts for at least 90 minutes