2016 A19 LED bulb power consumption tests

August 6th, 2016 Leave a comment Go to comments

We've always been curious if LED bulbs' power consumption is as advertised.  The answer is generally yes, with one exception that we've found so far.  Read on to see the results of our tests, and a video of our testing method.

If everything goes well, you should see a bar chart here.  If you don't, let us know what browser you're using.

In most cases, our power consumption was within 5.3% of spec.  The average difference was about one tenth of one percent.  One bulb that produced particularly interesting results was the Philips Warm Glow bulb.  Our first test indicated 11.8W - nearly 25% greater than spec.  We decided to test it a second time and discovered its power consumption gradually dropped over about 1.5 hours.  Over two hours 45 minutes, the bulb consumed an average of 9.13W.

Here's how we tested our bulbs:


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