How to choose LED Lighting?
Selection of best LED lights depends on their unique characteristics, they are:
1. Directional Light Emission: Unlike all directions emission of traditional light sources, LEDs emit light hemispherically mounted on a flat surface, so they reduce wasted light.
2. Low Profile/ Compact Size: The small size and directional light emission of LEDs offer the potential for innovative, low-profile, compact lighting design. The LED parking structure light shown here is only 6 inches high, compared to a common metal halide parking garage fixture almost 12 inches high. In parking garages with low ceilings, that six-inch difference can be valuable. For directed light applications with lower luminous flux requirements, the low profile benefit of LEDs can be exploited to a greater extent. Under-, over-, and in-cabinet LED lighting can be very low-profile, in some cases little more than the LED devices on a circuit board attached unobtrusively to the cabinetry.
3. Breakage Resistance:Traditional light sources are all based on glass or quartz envelopes. Product breakage is a fact of life in electric lamp transport, storage, handling, and installation. LEDs are largely impervious to vibration because they do not have filaments or glass enclosures. LED’s inherent vibration resistance may be beneficial in applications such as transportation (planes, trains, automobiles), lighting on and near industrial equipment, elevators and escalators, and ceiling fan light kits.
4. Rapid Cycling: Traditional light sources will burn out sooner if switched on and off frequently. LED life and lumen maintenance is unaffected by rapid cycling. In addition to flashing light displays, this rapid cycling capability makes LEDs well-suited to use with occupancy sensors or daylight sensors
5. Instant On: LEDs come on at full brightness almost instantly, with no re-strike delay. This characteristic of LEDs is notable in vehicle brake lights, where they come on 170 to 200 milliseconds faster than standard incandescent lamps, providing an estimated 19 feet of additional stopping distance at highway speeds (65 mph). In general illumination applications, instant on can be desirable for safety and convenience.
6. Cold Temperature Operation: LED performance inherently increases as operating temperatures drop. This makes LEDs a natural fit for grocery store refrigerated and freezer cases, cold storage facilities, and outdoor applications. In fact, DOE testing of an LED refrigerated case light measured 5% higher efficacy at -5°C, compared to operation at 25°C.
7. Controllability and Tunability: LEDs may offer potential benefits in terms of controlling light levels (dimming) and color appearance. However, not all LED devices are compatible with all dimmers, so manufacturer guidelines should be followed. As LED driver and control technology continues to evolve, this is expected to be an area of great innovation in lighting. Dimming, color control, and integration with occupancy and photoelectric controls offer potential for increased energy efficiency and user satisfaction.
8. No Infrared or Ultraviolet Emissions: Incandescent lamps convert most of the power they draw into infrared (IR) or radiated heat; less than 10% of the power they use is actually converted to visible light. Fluorescent lamps convert a higher proportion of power into visible light, around 20%. High intensity Discharge (HID) lamps can emit significant ultraviolet radiation (UV), requiring special shielding and diffusing to avoid occupant exposure. LEDs emit virtually no IR or UV. Excessive heat (IR) from lighting presents a burn hazard to people and materials. UV is extremely damaging to artwork, artifacts, and fabrics, and can cause skin and eye burns in people exposed to unshielded sources.
Come and visit Farrey’s showrooms, you will find many products to feel inspired