how much light is 1,000,000 Candle Light Power?
336571
The ad is little misleading. It is true that light sources are evaluated and quantified in terms of candles, but there are two different terms and they mean different things. The first term is "candela" which can also be referred to as "candlepower" and it refers to the amount of light given out by a source IN ONE PARTICULAR DIRECTION actually decribed at one angle. So to know how bright your source was in candlepower, you would have to know something about its beamspread. But- making a bunch of assumptions here- IF the light was more or less shaped as a floodlight (all the light being emitted in one direction like a wide spot), and if it had 1,000,000 candlepower at 0°, then your light could give out roughly 150 times as much light as a 100-watt incandescent yard light like you'd get at Home Depot.\nSecond term: Lumen. A lumen is the term for the amount of light coming out of the source in ANY direction. The lumen is also tied the the candle so there's a relationship between the candela and the lumen. But the thing to remember is that it's non-directional. Knowing how many lumens a source has doesn't help you to know what it does because it could be very intense like a spotlight or very diffuse like an ordinary light bulb - both can give out the same amount of total light.\nSo if your emergency light has 1,000,000 lumens, then it would have 100 times as much light as a 500-watt incandescent, or 300 times as much as a standard fluorescent tube, or 40 times as much as a tall streetlight.\nNow- I have to say that both of these numbers are really really really high. I mean we're talking tanning bed here. I would be very skeptical of this myself, and I would ask some hard questions of the seller. In lighting, as in life, if it seems too good to be true it probably is!
515359
1/1000th of an ampere
451714
Watts is a unit of energy. You probably have 100 watt light bulbs in your house. You probably also have 60 and 75 watt bulbs as 100 is pretty bright. If you are running and creating 100 watts you could power a 100 watt bulb--most peole can't do this for long. I don't remember what METS are, but it is some sort of power output also.
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.
269616
Dark is the absense of light.\n\nIllumination is measured in foot candles (in the US anyway) which is roughly equivalent to the amount of illumination created from a candle 1 foot away.
757465
Yes.\n\nLight intensity is often measured in units known as candelas. This used to be called candlepower, and one candlepower was the amount of light shining one foot away from a candle. If you cast one candela on one square foot of area, you now have one lumen - the root of the term luminous. Your units (mcd) are millicandelas. For far more detail, see the link below:
844228
Census statistics on no of candle fires and related deaths\nhttp://tinyurl.com/y4yj7g\n\nFrom \nhttp://list.nsc.org/membersonly/index.php/esc/results/C96/\n\n"Candles cause an annual 23,600 residential structure fires in the United States, resulting in 165 deaths, 1,525 civilian injuries and $390 million in direct property loss, according to a recent U.S. Fire Administration report (.pdf file). The report examines issues pertaining to candle fires including area of origin, causal factors, items first ignited, product recalls, residential fire losses and seasonality of candle fires. "\n\n\nSee USFA report "Candle Fires in Residential Structures"\nhttp://www.usfa.dhs.gov/downloads/pdf/tfrs/v6i1.pdf\n\n---- apologies to mt - did not mean to double up on info there\nGreat minds think alike - some of us do it slower :-)  sorry
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.
935541
THE candle?  any particular one?  If you mean the one on the taller holder, it's the "shamash" or lead candle.  It's the one that does the lighting.  The other candles don't have a name.
1040071
100 W == 100 joules per second, or 86.4e7 joules (roughly) per day.\n\nAssume all the energy here is transferred to heat (not true, as the bulb also gives out light)\n\nYou would need to know the heat capacity of the material in the closet to know exactly, but for air it's approx 1 joule per gram per deg K (http://en.wikipedia.org/wiki/Specific_heat_capacity)\n\nA 6 x 8 x 9 foot closet has volume 432 cubic feet, or ~ 12000 cubic decimetres ~ 500 moles ~ 14000 g which makes an increase of ~ 600 degrees K.\n\nSeems a bit high, probably made some errors somewhere....\n\nBut to compare this to a 14W lamp all you need to observe that this is 14 joules per second compared to 100, so the heat given out is about a factor of a seventh as much, so the increase would be around 100 K
677953
1000= 10 * 10 * 10 or 10^3
633793
A joule is the work done to produce power of one watt continuously for one second. \n\nA watt is a measure of the amount of electrical power required by a product to operate at any given instance.\n \nBut that's a a discussion of units of ENERGY, not brightness....\n\nWhat you want to know is lumens or candlepower. A lumen is a measure of the amount of light produced by a lamp  and candlepower describes the light intensity of a lamp in a certain direction. It is a measure of the light source itself, measured in candelas
1041455
This is pretty straightforward to figure out.\n\nFirst figure out how many candles.  Each one is 400g from a 20kg block.\n\nYou would divide:\n20kg / 400g\n\nFirst convert to the same units:\n20000g / 400g\n\nSo you can create 50 candles from a 20kg block.\n\nSelling them at £4 each that's a gross income of £200.\nSubtract your original investment of £40 for a profit of £160\n\nSelling them at £5 each, that's a gross income of £250.\nSubtract your original investment of £40 for a profit of £210\n\n(Note: this all assumes that you have no other costs, but in real life you have your labor, equipment, waste and defective product, electricity, marketing & sales, returns, etc.  So if this is a real life question, your net profit will actually be much less.)\n\nPutting that all aside for now, the answer to this question would be that you can make around 50 candles and a profit between £160 and £210.
41971
Cf graph below, lm/W for lighting sources varies between 1 /m/W for candles and over 100 lm/W for modern fluorescent lighting solutions.\n\nIncandescent lamps are around 10 lm/W, i.e. we can get up to 10 times more lm per Watt with other solutions.
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.
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.
1150061
Just one. But the light bulb really has to WANT to change...