Parameters for Selecting Good LEDs
The LED Kelvin Color Spectrum Scale
While all incandescent lights give a warm yellowish color, LEDs come in a wide range of colors, from purple to red. However, the most commonly used types come in the yellow/white spectrum. The color of an LED light is measured in Kelvins. A higher number of Kelvin indicates whiter light, while lower Kelvin indicates yellow light.
The Evolving Light Bulb
LED lights are relatively expensive as compared to incandescents or CFLs, but since they consume lower amounts of electricity, and have very long lifespans, they are more environment friendly and cheaper to operate in the long term. A good example of the evolution of technology.
Dimmer Compatible LEDs
Dimmer switches for incandescents may not always work with LED lights. So to make these lights dimmable, you either need to find lights which are compatible with traditional dimmers, or replace the traditional dimming switch, with a LED-compatible dimmer.
LEDs Approved For Enclosed Housing
After purchasing LEDs, make sure that they are not used in an enclosed housing, as this leads to the heating up of the bulbs, and a reduction in their lifespan. If you must use the bulb in a enclosed housing, make sure that you use LEDs that are approved for this purpose by the manufacturer.
LED Color Rendering Index
The CRI (Color Rendering Index) is the measure of the quality of light, which shows how well a light source replicates color in relation to daylight. So one should look for a CRI greater than 80 to get a good daylight color quality.
Warm White vs. Cool White vs. Daylight LED Lights
Living Room LED Lights
For most living rooms, warm white lights are preferred over cool whites, as they lend a comfortable and cozy feel to the area, due to their light red tint (2800 - 3200K). In addition to these, one can also use red, green, and blue bulbs for decorative purposes.
Bedroom LED Lights
For bedrooms, warm white LEDs are commonly used. Bulbs with dimming capabilities provide an added advantage in these areas of the house. Cool white lights (5000 - 6500K) could also be used if you prefer an arctic-like look for the room.
Utility LED Lights
For bathrooms, garages, basements, cabinets, etc., daylight (4000K) or cool white LEDs are good options. To minimize wastage of power, one can even set up sensor-activated light systems in these areas.
LED Lights For Outdoors
Depending on the ambiance and plants in a garden, warm white to daylight LEDs can be used to illuminate the area at night. Recently, solar-powered LEDs are also available in the market, which automatically illuminate at dusk, without the need of an electricity supply; ideal for the outdoors.
Other LED Light Tips And Facts
LED Bulbs Do Not Contain Mercury
While CFL bulbs contain small amounts of mercury, and need to be disposed off safely if broken, LEDs do not contain any such toxic materials and hence are perfectly safe for use.
When choosing LED lights, look for UV-free bulbs. They are less harmful, and they do not attract insects either.
UL Compliant Or UL Listed LEDs
Opt for 'UL Listed' LED bulbs and not for 'UL Compliant' bulbs, as the UL Compliant bulbs have only followed guidelines given by the Underwriters Laboratory, whereas the UL Listed bulbs have undergone stringent testing, which guarantees a good performance.
Use Only Bulbs With High-Quality LED Chips
Beware of LED lights made from inferior quality LED chips, it can reduce the lifespan of the bulb and provide inconsistent color performance.