Posted by dave2 on January 16, 2010 at 16:02:29 from (139.139.35.70):
In Reply to: Electricity use ????? posted by jd b puller on January 16, 2010 at 10:48:22:
ChrisB said: (quoted from post at 16:52:56 01/16/10)
Dave,
If you are using a transformer to reduce your voltage you need to calculate it's efficiency into your cost savings. If you are using one of the common 240v-120v gray ones, you can count on about 85% efficiency (the other 15% is the warm transformer you feel). In that case a 10 watt bulb will actually use 11.5 watts if you are using a current reducing transformer.
Just asking a question. I've only got one transformer (75 watt) on the place that I use to run my 110 volt makita charger, a normal battery charger, and a set of hair clippers.
I got the 120 volt CFL bulbs cause they were accidentally ordered by the commissary and were sold dirt cheap ($2 for 8 bulbs) and they fit with a power pack that I ordered on JDEMARIS' suggestion from another post.
Just noticed the difference on the two packs and thought I'd ask.
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