High intensity discharge (HID) lamps used to be a common choice for high bay lights. Mercury vapor, High pressure sodium, metal halide are all variants of HID lamps. These operate at high temperatures and are susceptible to moisture damage. Merely touching the surface of a cold HID bulb can leave traces of oil, which in turn can stress the glass of the bulb to breaking point when in operation. The result can be a bulb failure or in worse case scenarios can cause a bulb to explode.
High Pressure Sodium lamps have had limited success in displacing metal halide lamps largely owing to their limitation on light spectrum. The yellowish orange light emitted by HPS lamps has not helped endear itself to customers. A Fluorescent tube can provide good quality light and has fewer risks but its mercury content, ballast electricity consumption and susceptibility to on off cycling makes it a sub optimum choice.
The small profile LED lights, high lumen per watt output, long service life, reduced load on air-conditioning, high quality light and rebates under energy efficiency schemes have made them the topmost choice for high bay lights.
Advantages of LED high Bay Lights
With a light output of 75 Lumen per watt, LED high bay lights are thrice as effective as Metal halide lamps. 100 watts LED high bay light can replace 300 watt metal halide lamp or a 250-watt fluorescent high bay light.
1) Flicker free, low temperature operation
2) Up to 80% savings in electricity consumption
3) 15 to 20% reduction in air-conditioning expenses
4) 80% lumen maintenance over lifetime
5) Service life of more than 50,000 hours and fewer maintenance challenges
6) Better light uniformity (3 to 8 times better light distribution compared to HID lamps).
7) Less static build up and less light distortion
Do I need LED high Bay lights?
If your answer in the affirmative to one or more of the criteria listed below you need to consider a combination of these strategies
Installing LED high bay lights, Re-lamping, De-lamping coupled with task lighting, retrofitting, upgrade of lighting fixtures and redesign of lighting placement.
A) Your fixtures have HID or T 12 fluorescent lamps.
B) Your fixtures make a buzzing sound and there is appreciable light flicker.
C) Your facility is in an area prone to light outages and you would like lights that do not have a prolonged re-strike period and are not susceptible to on off cycling.
D) Your building was built before 1978 in the pre Title-24 energy efficiency standard days.
E) Your employees are reporting headaches and vision related challenges.
F) You would like to reduce air-conditioning loads or make the working environment cooler.
G) You would like to harness information technology for controlled switching off and switching on of lights.