Light Bulb Technology: Update II

Awhile ago I mentioned that I was starting an experiment on different types of light bulbs.  I think that there are three commercially available bulbs on the market.

  1. Incandescent
  2. CFL
  3. LED

I have purchased a bulb of each kind and am conducting an experiment with each of the three.  As part of the experiment, I need to account for:

  1. Quality of light
  2. Cost of bulb
  3. Heat of bulb
  4. Cost of electricity
  5. Cost of replacement

I just finished my evaluation of the CFL and I must admit, it stands the test of the test.

I find the light to be nearly equal to the light given off by the incandescent.  Which to me, in certain conditions, is a deal breaker.  Further, the heat given off by the CFL is manageable.  While I am unable to unscrew a traditional light bulb while burning, I was able to unscrew a CFL while burning.

So, the financials:

Bulb Cost per Bulb Cost per KWH Cost per hour Lifespan 50,000 Hour Cost
Incandescent $1.00 $0.1701 $0.0070 2,000 $375.00
CFL $1.00 $0.1701 $0.0017 10,000 $88.00

Not even close.  Over the course of 50,000 hours the savings is about 400% over the incandescent bulb.,  And if you demonstrate the savings in terms of 10,000 hours:

Bulb Cost per Bulb Cost per KWH Cost per hour Lifespan 50,000 Hour Cost 10,000 Hour Cost
Incandescent $1.00 $0.1701 $0.0070 2,000 $375.00 $75.00
CFL $1.00 $0.1701 $0.0017 10,000 $88.00 $17.60

Again, not even close.  However, the difference in 10,000 hours vs, 50,000 hours is that 10,000 hours is very close to a year.  Just be switching to a CFL bulb you can save about 60 bucks a year.

Per lamp.


The light is a little bit more raw, but, if you are like me, you will have a shade over the bulb.  And that shade blunts the glare of the CFL to the point that you can’t tell.

At this point, the CFL wins hands down!

2 responses to “Light Bulb Technology: Update II

  1. Very interesting, thanks for sharing these results

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