How efficient are LED light bulbs?

Compare LEDs to compact fluorescent lights (CFLs) with 55-70 lumens per watt, and traditional incandescent bulbs with 13-18 lumens per watt, and the LED advantage is bright as day. LED manufacturers are not only increasing efficiency, they’re expanding options.

How much money do you save with LED lights?
The LED bulb uses only 25 cents’ worth. So the LED saves $1.23 per year. Since it costs $20, it will take 16 years to recoup the cost in electricity savings. At five hours a day, the incandescent uses $15.42 in electricity annually.
What is the equivalent wattage for LED bulbs?
(The point, after all, is that they draw less energy.) For example, an LED bulb with comparable brightness to a 60W incandescent is only 8 to 12 watts. But don’t bother doing the math – there isn’t a uniform way to covert incandescent watts to LED watts. Instead, a different form of measurement should be used: lumens.

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LED vs CFL vs Incandescent

Both CFLs and LEDs use considerably less electricity than traditional bulbs. As you can see, buying longer-lasting, more efficient light bulbs can really pay off over time. Over a 23-year period, it will cost you over $200 (and many trips to the hardware store) to keep one 60-watt lamp lit with incandescent bulbs.

Energy Efficiency & Energy Costs	Light Emitting Diodes (LEDs)	Incandescent Light Bulbs	Compact Fluorescents (CFLs)
Life Span (average)	50,000 hours	1,200 hours	8,000 hours
Watts of electricity used (equivalent to 60 watt bulb). LEDs use less power (watts) per unit of light generated (lumens). LEDs help reduce greenhouse gas emissions from power plants and lower electric bills	6 - 8 watts	60 watts	13-15 watts
Kilo-watts of Electricity used (30 Incandescent Bulbs per year equivalent)	329 KWh/yr	3285 KWh/yr	767 KWh/yr.
Annual Operating Cost (30 Incandescent Bulbs per year equivalent)	$32.85/year	$328.59/year	$76.65/year

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LED Bulbs Come in a Wide Range of Colors

If you're seeking an ultra-efficient colored lighting solution, the answer lies in colored LED light bulbs. These energy-saving, eco-friendly lamps are incredibly versatile and can be used to great effect in a multitude of environments, whether you're trying to create an atmosphere at a special event, add color to a gallery.

Take a look at the LED packaging to see the product's K ratings. K stands for Kelvin, a measure of “color temperature” (the color of light), and you can find bulbs anywhere from 2,700 to 6,500 Kelvin. In general, bulbs up to 3,000k produce warm (slightly yellow) light that’s relaxing and therefore ideal for general living spaces; bulbs from 3,200k to 4,500k are cool (white) light that’s perfect for work spaces such as kitchens, bathrooms, and garages; anything over 4,600k is considered daylight and is best used for outdoor and security lighting. Another measure of color quality is CRI—color rendering index—which indicates how accurate colors look in the light from the bulb. Make sure LEDs you buy have a CRI of 80 or higher. 

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