How Much Energy Do LED Light Bulbs Really Save?
May 29 2019
LED bulbs are more efficient than traditional incandescent or even fluorescent bulbs.
You've probably asked yourself: how much energy do LED bulbs save? To get an accurate answer, it's important to understand that the energy savings far exceed the simple total energy consumed by a single bulb or LED bulb. Let's take a look at some information about LED bulbs and how much energy they actually save.
LED and incandescent: a clear choice for energy conservation
In this era, leds have overtaken incandescent bulbs as the first choice. Let's start with this simple statistic: incandescent bulbs use more than six times as much energy as incandescent bulbs. Not only that, incandescent bulbs need to be replaced more frequently than leds, because their lifespan is shortened by an average of about 50 times.
When we adopt this number, we can do some key head-to-head comparisons between leds and incandescent bulbs.
The main cost
Cost of the second year of operation
Cost of purchasing and running 3 hours/day per year
G means how much energy an LED saves, working backwards from operating costs to the national average per unit of energy cost. The average electricity price in the United States is about 12 cents per kilowatt.
Compared with compact fluorescent bulbs, LED energy reaches killowatt-hours
Leds are better at long-term energy efficiency than compact fluorescent bulbs. Let's look at two quick statistics to illustrate this point.
Cost of operating for 3 hours a year:
Compact fluorescent: $5.04
... At 12 cents per kilowatt hour...
Leds are 23.5 KWH and compact fluorescent bulbs 42 KWH.
Energy efficiency of leds: the bigger picture beyond the facility
Leds are more durable than incandescent bulbs. This means that you will not only save operating costs and energy, but you will also save time that would otherwise be spent on ladders replacing burn-out bulbs. When you think about the bigger picture, you have to remember that generators don't need to be as hard to power as LED bulbs. That means reducing our dependence on coal. The more efficient we are, the less energy we need to harvest coal in the first place in the long run.
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