By: Lee Boyland, RID, IIDA, NCIDQ, LEED Green Associate LED lighting is becoming more popular and available for residential purposes. If you are considering LED lighting, here are some basic factors you should consider: Light Output: Unlike incandescent and fluorescent lamps, which are measured in watts, LED light output is measured in lumens. So how many lumens provide enough ambient light? Well, 100-watt incandescent lamps are roughly equivalent to 1,600 lumens, and 60-watt fluorescent lamps provide about 840 lumens. Keep in mind, the higher the lumens, the higher the cost! CRI (Color Rendering Index): This is a scale that measures the quality of the light – how well it renders the color of objects. It’s a scale of 0 – 100, and anything above 80 is considered quality lighting. Color Temperature: Depending on the application of your lighting, you may choose a warmer or cooler light. Warmer LED’s are typically preferred in residential settings, whereas cooler LED’s may be preferred in tasking areas such as offices. Color temperature for lighting is measured in Kelvins. A 3,000 Kelvin measurement yields a cooler light, and a 2,700 Kelvin measurement yields a warmer one. Considering these three factors will help you select a quality lamp that meets the needs of your space! Material borrowed from Sherwin Williams Stir Special Issue 2013 publication, and the MIT Technology Review How to Choose an LED Light Bulb .