I have a touch lamp. I want to know what it's costing me to run.
April 20, 2007 5:13 PM Subscribe
I have a touch lamp, which I'm finding incredibly useful to turn off when I'm half asleep. However, I'm also a bit of an eco-warrior. I've been looking online, and found that a small amount of energy is supplied to the lamp at all times. Surely that must be costing me something?
posted by Solomon to technology (16 answers total) 4 users marked this as a favorite
Using my Kill-a-watt, I've found that while the lamp is "off" (as in unlit), the only energy being registered is 1.0 PF. Nothing else is active on the display. When the lamp is lit at 20w, the PF is 0.70, when lit at 35w the PF fluctuates between 0.86 and 0.94 and when the lamp is fully lit (40w) the PF is 0.99.
What is a PF?
How much is it costing me (per week/month/year/whatever is easiest) to leave the lamp switched on, but unlit? I'm in the UK, on a 240v supply. Better still tell me how I can work it out myself.
I am an electrical-term-n00b, so please keep your answers simple. Please let me know if you need more info. Bonus points if you can point me at a site that explains this stuff in a very basic way, so I can get my head round it.