Impressive Money Savings with LED Lighting
About a year and a half ago I moved into a new house, with much of the lighting provided by incandescent bulbs. As they burned out, I replaced them with LED bulbs with the intention of never touching them again, and saving a little bit of power… After some quick math though, I quickly ordered and replaced 12 more bulbs, realizing that I was throwing away a lot of money for no apparent reason.
The Money Math Revelation:
In my kitchen, I had 5 incandescent floodlight bulbs at 65W each, plus another 10 in the “formal dining room” AKA kid’s playroom. This gives a total lighting draw of 975W (let’s round up to a full kilowatt) and if each is turned on for 5 hours a day, 5 kilowatt hours (kWh) of energy used. Average price of electricity in the US is around $.10/kWh, so $.50/day for lighting these rooms.
This doesn’t sound so bad, but multiplied by 365 days/year, that gives $182.5 that I’m spending to power these lights/year. The new LEDs that I purchased (Amazon) work off of 11 watts, giving a total power of 165W, roughly 17% of the previous number. So spending in the future on these lights will be around $31, or a savings of $151.5/year at a cost of $55.82 in lights.
Taking this further, consider that your air conditioning unit doesn’t have to cool your house from these lights (especially in hotter climates), so savings are actually a bit higher than this for me being in Florida. The lights that I purchased last up to 10,000 hours, so based on 5 hours/day usage, they should last for over 5 years (or well over 20 years at 3 hours/day per the description, which seems a bit inconsistent), so if you multiply this savings out by 5, I’ll be saving over $750 over the life of these lights.
Time for LEDs? Absolutely
This effect is even larger for 100W bulbs (Amazon- these from Philips look good, but not sure which kind I have). While I’ve been replacing lighting with LEDs as needed, I didn’t bother to calculate things out at the time. Just be sure to select the right temperature — I went with 2700k — and dimmable if you need them, since you’ll have the bulbs around for a long, long time.
While LEDs were initially too expensive to consider, and CFLs were a disaster IMO for several reasons that I won’t get into here, it’s time to consider better lighting. While if you only have a light or two to consider it might not make a big difference, but in medium or largish houses the effect could be tremendous.
Note that links to Amazon are affiliate, so I get a small percentage of purchases at no additional cost to you.