Ballasts - High pressure discharge lamps Print
Modified on: Mon, 20 Jun, 2016 at 9:44 AM
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The advantages and disadvantages of high pressure sodium lamp and energy-saving lampswith reference to street-lighting, how do sodium lamps differ from led lamps?1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.2. As street-lights, sodium lamps have longer life span than LED lamps.3. The spectrum of vLow Pressure Sodium LampsDecrolux | High Pressure Sodium vs LED - What’s The DifferenceThey stabilise the lamp current and thus lamp power. The rating of the ballast is important to ensure proper lamp operation.
In the case of low-power (150 W) metal halide lamps especially, an excessive temperature rise can occur in the ballast at the end of lamp life. The ballast should therefore always be fitted with overtemperature protection.
Whereas high pressure mercury lamps strike at mains voltage, most metal halide and high pressure sodium lamps require an additional Igniter.
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