Yes, you can use a 10 watt 12 volt bulb instead of a 5 watt bulb as long as the fixture can handle the higher wattage. Just be aware that the 10 watt bulb will be brighter and may generate more heat, so ensure there is proper ventilation and that the fixture can handle the increased power load.
To power ten 12 volt 10 watt lights, you would need a transformer with a total output of at least 120 volts and 100 watts.
AWG # 10 wire on 30 amp circuit.
You multiply the watts by the seconds. 10 hours is 36,000 seconds, so the watt seconds is 60 x 36,000 Answer 2,160,000 watt-seconds You can also say the bulb uses 60 x 10 or 600 watt-hours.
A billion watts. A watt is one amp at one volt.
The 12 v light should have the voltage and the power in watts printed on it. When it is running, it uses that amount of watts continuously. The energy is measured by the watt-hours, in other words the watts multiplied by the number of hours it runs for. 1000 watt hours makes 1 kilowatt-hour, which is a Unit on the electricity bill.
To power ten 12 volt 10 watt lights, you would need a transformer with a total output of at least 120 volts and 100 watts.
AWG # 10 wire on 30 amp circuit.
'Lighting', or the amount of light is not measured in watts. A 'watt' is a unit of power, measurement of current drawn. Most 100 watt/110 volt lamps initially produce 1690 lumens (a 'lumen' is the measure of the total "amount" of visible light emitted by a source). A 15 foot by 10 foot room is not very big, and one or two 100 watt incandescent lamps on a ceiling light fixture on a 120 volt service can light it adequately. I mention "110 volt" as in parts of the world with 220 mains these numbers change. As the voltage is doubled, the watts required would halve for the same amount of light. In other words, all other things being equal, a 50 watt 220 volt lamp should use the same amount of power, producing the same amount of light as a 100 watt 110 volt lamp.
On a 12 volt system the 80 watts draws 6.7 amp and the 120 watts draws 10 amps.
Use a properly rated potentiometer.
Define "wasting electricity"? A 100 watt light bulb burning in the attic 24/7 is waste, if you ask me. If you mean "reduce electrical consumption"....yeah, lots of ways. Use 60 watt bulbs instead of 100 watt bulbs. Or better yet - use a flashlight instead of bulbs. Use a gas hot water heater instead of electric. Raise your AC thermostat 10 degrees. Use LED bulbs. Get rid of all your televisions. etc... etc..... You didn't say "...and be practical about it.
k is 1000 V is volts A is amps basic algebra kVA = (V * A)/1000 120 Volt with 20 Amp would be: (120 * 20)/1000 = 2.4 kVA
The time it takes to charge a 12-volt battery with a 13-watt solar panel will depend on various factors such as the battery's capacity, its current state of charge, weather conditions, and efficiency of the charging system. On average, it may take around 8-10 hours of good sunlight to fully charge a depleted 12-volt battery with a 13-watt solar panel.
Using a 10 volt power supply for a 9 volt keyboard is not a good idea. The higher voltage will cause damage to the keyboard, burning it out and making it useless.
You multiply the watts by the seconds. 10 hours is 36,000 seconds, so the watt seconds is 60 x 36,000 Answer 2,160,000 watt-seconds You can also say the bulb uses 60 x 10 or 600 watt-hours.
A billion watts. A watt is one amp at one volt.
The 12 v light should have the voltage and the power in watts printed on it. When it is running, it uses that amount of watts continuously. The energy is measured by the watt-hours, in other words the watts multiplied by the number of hours it runs for. 1000 watt hours makes 1 kilowatt-hour, which is a Unit on the electricity bill.