HID Lamps and LED Retrofit Kits

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HID Lamps and LED Retrofit Kits Comparison CONTENT _____________________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________

HID Lamps – Definition LED Retrofit Kits - Definition Comparison Chart Payback Example Summary

HID Lamps - Definition _____________________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________

HID lamps are gas-discharge lamps that replace the filament of ordinary bulbs with a capsule of gas. As soon as current is passing the metal vapor in the capsule, free electrons collide with atoms in the vapor. This collision is an arc discharge between two close electrodes that is setting energy free in form of visible radiation. The light is characterized by the metal vapor type. HID lamps need some time to reach their full light intensity as the gas needs to warm up and to cool down before a restart is possible. Switching cycles have a negative impact on the total lifetime of the lamps. HID lamps are used in areas where high levels of light over a large area are

required.

They

produce

significant UV radiation that the components

of

the

lamp

and

luminaire need to be protected from. An inductor, conventional control gear

or

electronic

ballast

with

overload protection is necessary for running HID lamps. They are not Copyright © 2008-2015 MyLEDLightingGuide.com All Rights Reserved

1

dimmable, only ceramic types can be dimmed with special ballast and connected to limits in dimming range. ADVANTAGE Efficient light source – till 100lm/W

Lifetime quite long < 30,000h

CRI