how much power does a zero watt bulb consume?
472530
Apparently it's a 12 watt bulb, sold as a "zero watt bulb" (ref.). Go figure.
829486
Of course not; that would be akin to perpetual motion.  Of the energy used by a lamp, between 5% for an incandescent light bulb to nearly 30% for the best fluorescent tube ends up in usable visible light, and at the other end, the best (and quite costly) solar cells convert 18% of the light in electricity.  So, assuming ALL the light from the best lamp is directed to the best solar cell, you get power back at the rate of 5.4%.  It will get dark pretty quick...
255379
I run my web server on one. http://bibleprojector.servehttp.com\nIt only takes 20W to power.
765230
EER = Q in (BTU/hr) divided by W in (watts)\n\n600/500= 1.2
27524
400 Watt should do fine.  If you have more then 2 hard drives, go to 450 Watt.
413474
Electricity is charged by the kilowatt (1000 watts) hour.  A 60 watt bulb uses 60/1000 hr. That's .06 times price per KWH.
932209
Basic-   15 amp circuuit should not hold more than 1440.00watts, or 12 amps ( 1440watts / 120v= 12 amp).  you should load the circuit for lighting or continual use more than 75%.  the same for 20 amp circuits. (1800 watts/120v=15amps).   Check the back of the space heater. It should the watts listed.
1132393
She could be right assuming that the power sources are the same. You are drawing more current ( however slight which has the compound effect of causing more current draw) using both lamp and fan from the same source, thus producing more heat in that circuit ( heat produced is wasted engergy) It is unlikely unless you are doing this throughout your house that you would notice the difference in your electrical bill. Using two separate circuits and devices you theoretically would produce a slightly less amount of heat thus less wasted energy. Remember we are talking minute amounts of difference in heat produced.
319509
Its impossible to tell how many watts the computer is consuming by a program, but there are ones out there that can tell you the voltage.  this is what you need to know.  as far as if you power supply is powerful enough, anything of 450 should be more than enough unless you have some kind of huge amazing rig setup.  Mine is 500 and Im powering 3 hard drives with it.
500605
Basically.... it is as simple as (Voltage X (times) amperage = Wattage) example.... \n\na 120volt motor pulling a normal 3 amperes  ....will consume 360 watts of electricity... \n\nThe more amperage the motor requires.... the higher... the horsepower... and also the cost to run or operate it...
330950
actualy, i think they use the same voltage, but have a transformer on the batery to up the voltage to the needed amount. are you looking for the bulb, or a batery powered fixture. you use a standard bulb, you can find it anywhere florescant bulbs are sold. i have seen those fixtures at spencer's and places like that.
20622
You'll need to know what the electricity costs per kilowatt hour. They you need to know how many watts each bulb uses per hour. There are many different kinds of flood lights, the standard incandescent fllod light, mercury vapor, halogen, high pressure sodium, low pressure sodium. Each of these has an advantage in light and uses energy differently in producing light. You can determine the light output by the number of lumens the bulb produces.
508033
1.125 KW or 1125 Watt
129610
Volts is not a measure of power. It is a measure of potential energy. To measure power you should be thinking watts. So a 100W lightbulb is twice as powerful as a 50W lightbulb (W stands for Watts).\n\nNow suppose you have a 100W bulb at 100 volts (100V). It must be consuming 1 Ampere (1A) of current because Watts = Volts x Amperes. But a 100W bulb at 10V would draw 10A (10x10). It would be wrong to say that the 10V bulb is less powerful than the 100V bulb if they were both 100W.\n\nThat being said, real light bulbs are rated in watts at their operating voltage. So a 100W bulb at 110V draws about 1A, but if you put 12V through it, it would not draw enough current to be a 100W bulb anymore. In other words, don't think that because a 100W bulb is marked 100W that it always draws 100W under any circumstances -- it is just a convinient marking to guage relative strength.
374633
"So 50 amps without considering lighting."\nthats the pitfall right there. \n\nAmperes is the unit for measuring current. Since the supply voltage is fixed at 110 v (I assume you are in the americas), the amount of energy you are using is given by the number of amps you are drawing.\n\nthe current drawn by each of the appliances, adds up arithmetically. Ideally your supply should support running all your appliances at the same time. and that should include lighting. \n\nif your lighting draws close to or more than 10 amps then you are overshooting your supply rating, you should upgrade.\n\nLike somebody else mentioned, air conditioning units and picture tubes draw a large amount of current (much larger than the value mentioned on the manual), when they start up. I'm not sure how your panel/utility company policy are set up to handle this, but it can be a problem if you are operating with too little amperage to spare.\n\nagain you are right that all the equipment would not be operating at full blast at the same time, but think of this hypothetical situation: after a power outtage, all the equipment want power to get back to normal operating state (heated/cooled/whatever), you might have to bring them up in stages, switching on one unit 30 mins after the earlier one was switched on..\n\nand there is one more thing you are overlooking: planning for growth. you dont want to go through the hassle of upgrading your supply limits just because you bought a new neon lamp for your window :)
1137293
Zero. They won't do it. Engineers are too busy to change light bulbs and it's beneath them. Just one and he/she will tell you.
928685
An electric INCANDSCENT bulb uses a tungstene filament (twisted wire) that is heated by the current passing through to several hundred degrees.  It is this heat that heats the glass.  It is also the proof of inefficiency of the bulb, because it is transforming 80% of the energy it receives into heat, giving only 20% for light!\nIn the FLUORESCENT tubes, the light is produced by the ionisation of the internal gas (neon or argon).  This ionisation is initiated by heating two small filaments at teach end of the tube, that heat up a small drop of mercury.  Once the mercury is vaporised inside the tube, the "starter" opens, creating a high voltage puls across the whole tube, ionising the gas that then becomes conductor: a small current passes through the gas, and the filaments are disconnected.  Since the ionised and conductive gas has nearly no resistance, the current is limited by the "ballast" (an inductor inserted in series).\nSince the CURRENT is limited, there is no "Joule Effect" (heating) and the tube stays pretty cool.\nTheir efficiency is about 100 times more than a bulb... (in terms of power/light ratio).