The choice of a LED product is guided by watching specifications tables. Here is one table accompanied by the explanation of the features. The result should be a good lighting solution that is leaving a green ecological footprint. A good lighting solution is emitting enough light that the tasks in space can be conducted properly.
First, the lumens of the fixture (responsible for brightness in the room), the CRI (how good is the lighting concept representing colors), color temperature (how is the ambiance in the room) and lumen per watt (efficiency of the system) are recommended to be watched.
These criteria are responsible for a good lighting quality and energy efficient solution.
1. Type: The products name is a detail for purchasing the fixture
2. Wattage: Defines the energy consumption of the fixture, which is important for achieving light levels. Its what will end up reflecting on your lighting bill.
3. CRI: Important character in areas where colors should be truly represented. For applications where people are involved, a CRI lower than 70 is not recommended. 70 CRI is fine normally, higher CRI is recommended for retail spaces.
4. Lumens: responsible for the brightness in a room. The more lumens, the brighter the fixture is illuminating the space.
5. Lumens per Watt: Efficiency of the lighting system. The higher the lumens / watt the lower the lighting bills.
6. Lumen Maintenance: how fast LEDs lose their brightness compared to new products (most manufacturers refer to the time when most of the LEDs reach 70% and less of the initial lumen output)
7. Color Temperature: defines the mood or ambiance in a room. Low quality lighting fixtures mostly have a very cool color temperature as these LEDs are more efficient than warm white LED products. A color temperature higher than 6000K is not recommended for a lot of areas.
8. Beam Angle: the light is radiated into the indicated beam angle. LEDs are direct light sources with typical beam angles of 120° till 180°.
9. Life Hours: defines the lifetime of a LED product. LEDs last 50,000 hours up to 100,000 hrs.
10. Replaces: a helpful information for replacing conventional light sources
11. Working Voltage: high quality LED products have an integrated LED driver and typically offer self-switching drivers in 100-277V and 277-480V ranges.
12. Frequency: detail about the admitted voltage frequency. Typically 60 hz for North American Markets
13. Power Factor: Efficiency of the ballast. Look for .9 or higher.
14. THD: Total harmonic distortion is describing the distortion caused by ballasts and other inductive loads of the input current on alternating current (AC) power systems
15. Operating Temperature: The light source is operating under the mentioned conditions according to the manufacturer datasheet, other temperatures will cause the light source to fail or work not properly (e.g. light loss, different color temperature)
16. IP Rating: the protection of the light source, ballast and wiring against liquids and solid objects
17. Dimmable: dimming is the change in light source brightness, mostly undertaken by smart controls
18. Dimensions: the fixture’s size, important for the definition of the mounting position and space
19. Net Weight: the fixture’s weight, important for the mounting construction, e.g. ceiling strength needs to be considered
20. Housing: the housing is the surrounding of the light source and ballast, the higher the IP rating, the better the protection against liquids and solid objects which is important in car washes for example, the coating is important in swimming halls where the luminaries are exposed to chloride and humid conditions
21. Mounting: possible mounting ways like pendant, surface or hook mount
22. Warranty: how long after purchasing, the products are ensured working properly
About the Author
Dwayne Kula is President of LED Lighting Supply. On any given day, Dwayne is writing content for the site and helps manage the marketing initiatives that are on-going. He has a Software Engineering degree and still dabbles in writing software for the company as needed. When not working, he enjoys spending time with his family, working out, playing the occasional game of golf and exploring New England.