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| Thread ID: 81300 | 2007-07-23 09:13:00 | Add on to lightbulb for motion sensitivity | mister harbies (5607) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 571776 | 2007-07-25 00:44:00 | I beg the question, What happens if you sit down to read a book? maybe you should have a book of short stories ??? PJ :D |
Poppa John (284) | ||
| 571777 | 2007-07-26 10:59:00 | Originally Posted by Neongreen I beg the question, What happens if you sit down to read a book? maybe you should have a book of short stories ??? PJ :D Or don't read in the laundry |
joemac (9739) | ||
| 571778 | 2007-07-26 11:48:00 | You're good, very good. | Neongreen (6358) | ||
| 571779 | 2007-07-26 13:00:00 | I beg the question, What happens if you sit down to read a book? Good exercise as you will have to get up and walk around every 4 minutes :lol: |
CYaBro (73) | ||
| 571780 | 2007-07-27 00:35:00 | Its intended for the hallway, not the bedside lamp where I will be reading books. Wattage and Voltage... all the same to me :horrified I'm not in a rush to get a light like this, but just since I have moved to a new flat last weekend, I thought a motion sensitive light is just what this hallway needs. I'll try the light shops. I wonder how shops like the lighting shop and Vacuum shops make their money? |
mister harbies (5607) | ||
| 571781 | 2007-07-27 01:17:00 | If it's just to see where you're going in the hallway, a low wattage energy saver bulb could run for a long time on the money spent on a motion detector. | PaulD (232) | ||
| 571782 | 2007-07-27 04:03:00 | Neongreen's conundrum is handled by the type of device. If it's "motion sensitive" , it wouldn't matter what else you were doing (or not doing) while you sat. Wattage and voltage are the same only when the current is 1 amp, mister harbies. Vacuum shops make their money by extracting air, compressing it (which heats it) and selling it to politicians. They sell vacuum only as a byproduct. |
Graham L (2) | ||
| 571783 | 2007-07-27 04:59:00 | Unfortunately they don't offer surgical facial reconstruction, although certain highly placed politicians certainly need it. Voltage - NZ runs on 230-240V(Say 240V, but it varies). Amps are simply lumps of volts, so in NZ, it's 240V for each amp. Wattage is simply the amount of amps multiplied against the number of volts. More detail - Volts are the electrons which move through the wires, but amps is the actual "speed" and therefore energy of the electrons. So 2 amps will provide twice the energy as 1 amp because there's twice the amount of energy pushing those electrons. If you want to get real tricky, you can half the voltage to say 120V(half the amount of electrons as before), and then it requires twice the amount of amps to get the same energy. |
Neongreen (6358) | ||
| 571784 | 2007-07-27 06:03:00 | Neongreen, Mr Ohm would argue with you . His unit has a lot to do with electrical circuits . As I said, the wattage equals the voltage only at a current of 1 amp . (For that to be true, you would need a resistance in ohms equal to the voltage applied) . There's nothing that says that NZ=240 ohms . :( The voltage is the potential difference which causes electron flow . Amps are not simply "lumps of volts" . Current is a measure of the number of electrons flowing in coulombs per second . Mr Ohm's law says: I=V/R . W=(E^2)/R or W=(I^2)xR . If you have twice the current (at constant resistance) you must have twice the voltage, so you have four times the power in watts . |
Graham L (2) | ||
| 571785 | 2007-07-27 07:19:00 | O rly. So that means I was wrong. Meh, I still stand by my comment about the politicians XD |
Neongreen (6358) | ||
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