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What you see
Brightness (lumens)
CRI Color Rendering Index
Color Temperature (Kelvin)

Energy Use
Energy Cost

Bulb Specs
Bulb size
Base type
Bulb finish

Other topics
retrofit vs. new install
ballast bypass
LED drivers
lighting controls

Understanding Watts

Watts are a measurement of the amount of electrical energy used in a bulb or fixture. Fluorescent and LED lights use very few watts to create brightness (light), which is why they are called "energy efficient" light sources. That energy efficiency can turn into savings on your electric bill, when switching to LED, as you will spend less energy every month to light your home or workspace. 

Before the mass adoption of LED and CFL lamps, light bulbs were most often known simply by their wattage. Since incandescent bulbs always converted energy into light at the same efficiency, people would ask for a 60 watt bulb, because they knew that a 60 watt bulb would light their space appropriately (around 800 lumens) while a 75 watt bulb would create too much light (1100 lumens) and a 40 watt bulb would create too little (450 lumens). LED lights have changed that preconception, as 60 watts in an LED would create an uncomfortable amount of light in a single bulb. In fact 60 watts can power an 8-foot LED light strip, creating 10 times the amount of light you would want from a simple 60-watt replacement bulb.

Why are LED lamps so much more efficient?

While incandescent lamps have been the standard for nearly 100 years, they were never terribly efficient at turning energy into light. The light is what people were looking to produce, but in the process a lot of that energy was turned into heat. That's why you don't want to change a light bulb right after you turn it off, and why easybake ovens actually do cook food. But most LED bulbs will remain relatively cool to the touch after running for hours. Those were hours that your light bulb was not generating heat, and thus not wasting your money on a product (heat) that you never wanted to produce.