After a long DIY well pump replacement, extra parts I didn’t need went back to one of our big box stores. Since we needed a carbon monoxide detector replacement (they don’t all last forever), I poked around through the lighting aisles and found a wide variety of LED replacement bulbs. What I also found was the wattage ratings are creeping up to the CFL equivalent of 13W for a 60W equivalent bulb. Not that I would buy a CFL bulb that needs replacing every seven months when the LED bulbs are carrying up to a three year replacement (and I have several that have lasted longer than that), but the concern is the Total Cost of Ownership (TCO) compared to what could be achieved. It’s also called “comparisonitis” in some circles, (others call it penny pinching among other things).
Back to the bulb and some “standard” comparisons they like to write about:
- Wattage (compared to web)
The Utilitch Pro Warm White 60W Replacement bulb (indoor) part #0424722 is a glass and metal LED bulb that replaces the standard A19 base (screw in base normally found in the states). Distributed by FEIT Electric, this UL listed (yay!) bulb is 800 lumens, and has a 270 degree light distribution. Previous lights that have a “half-dome” exhibit shadowing that can make them inadequate for table lamps, casting most of the light upward. The other issue with the upward facing configuration is the heat will concentrate on the glass, possibly shortening the life of the bulb. the curvature of the heat sinks may help alleviate some of this but I don’t have the equipment necessary to test such things; I’m a “home-moaner” not a scientist.
According to the packaging, the bulb consumes 9.8W. The Kill-A-Watt measured 8.0W, measured after it had been on for about one hour. On Amazon.com there is a similar bulb with the same box displayed advertising the bulb as a 13W, with the specifications stating it is 9.8W. There is also a similar bulb from utilitech that is a 65W replacement where the numbers in the picture and the specifications do match (this is part #0338931). Note: the big box store had them advertised at $10.98 US, so it was worth the drive compared to $15.99+ $5.49 shipping.
Aside from these discrepancies, there is the “Estimated Yearly Energy Cost”: to reach the $1.18/yr cost based on $0.11/kWh, you would have to run the bulb for three hours per day average. Also the 22.8 yr lifespan is based on this same use per day.
Factoring in a more realistic $0.20/kWh (since we’re not just paying for the electricity, but also the “line charges”, the “transmission charges” and probably the “utility worker driving by to electronically read our meter from the comfort of his cab at thirty miles per hour” charges, it still compares nicely at – okay, I just looked back at several of my posts: seems my calculations are a bit non-standard too…
So I’ll be going back and trying to “standardize” my measurements as well, starting now:The Utilitech Pro #0424722 run for 1000 hours will cost you $1.96, based on $0.20/kWh.
An equivalent 60W bulb run for 1000 hours would cost you $12 based on $0.20/kWh.
- To figure out how much it will cost you to operate for 1000 hours, find your utility bill and figure out your actual cost per kWh
- multiply the cost per kWh by the wattage of the bulb (in this case 9.8)
That makes about 2.74 hours per day for the bulb. Too low? You leave the lights on 8 hours per day? take the total from the 1000 hours and triple it for a close estimate.