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The answer is 0.04 kW. Since it says the bulb is a 40 watt bulb, just divide by 1000 to get the kW of the bulb.
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To answer this question correctly a time span must be given. How long will the bulb be energized to give the rating of kWhkilowatt hours.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoInformation for this question will have to be taken from the fixtures ballast. W = A x V. Multiply the volts times the amperage written there and that will give you the answer.
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How much amperes does a 40W fluorescent lamp draw?
easy as 1 2 3
Is it safe to use a 20W low-energy fluorescent bulb in a 40W fitting instead of the usual 7W equivalent?
Yes, you are still only using half the power as normal, the 7W would give you the equivalent light output and the 20W would give you more light.
How long could 90 Js of energy light a 40 Watt light balb.?
Power (watts) = Energy (joules) / time (seconds). Thus, Time (seconds) = Energy (joules) / Power (watts) = 90J / 40W = 2.25s
Will four 50 watt halogen bulbs give as much light as eight 40-watt incandescent bulbs?
If the fixture was the exact same, and one held a single bulb and one held a double bulb then NO. The light given off bulbs is marked as wattage when you look at the package. So a 100w bulb has less light than two 75w bulbs together, because the two equal 150w.
How bright is 55 lumen?
Not very bright at all. A 40W light bulb is about 450 lm, so a 55 lm source would be about 1/8th as intense as a 40W bulb.
How much energy does it take to light fluorescent a light bulb for 1 hour?
The average home fluorescent lamp consumes 40W of power. Running for one hour it will consume 0.04 KWh. Units of electricity are charged per Kilowatt hour.
How much amperes does a 40W fluorescent lamp draw?
easy as 1 2 3
What does 40W mean on a light bulb?
It means that the power consumption of the bulb is 40 watts.
Is it safe to use a 20W low-energy fluorescent bulb in a 40W fitting instead of the usual 7W equivalent?
Yes, you are still only using half the power as normal, the 7W would give you the equivalent light output and the 20W would give you more light.
Which bulb will glow brighter with 220V - 40W or 400W?
-- The voltage makes no difference. -- The 400W device dissipates ten times as much power as the 40W device does. We don't know how much of each one's power consumption is radiated in the form of heat, UV light, etc. But if the spectral distribution of their output is similar, then the one that dissipates more power produces more visible light, and appears brighter.
Shouldn't a lamp always be able safely to accept up to a 40W compact fluorescent light bulb if it is rated to accept a 40W incandescent light bulb--barring any physical size contraints?
Yes, your assumption is correct. Lamp fixtures are rated on how well they dissipate the heat given off from an incandescent light bulb. As CFL lamps run much cooler there is no problem using them in the same rated fixture that is incandescent rated.
How do you calculate the current in 40W tube light in 230V?
Voltage x Current = Power So Power / voltage = current Now you do the math
How much load takes the ceiling fan and tube light?
ceiling fan approx 80w and tube light 40w
How long could 90 Js of energy light a 40 Watt light balb.?
Power (watts) = Energy (joules) / time (seconds). Thus, Time (seconds) = Energy (joules) / Power (watts) = 90J / 40W = 2.25s
How much electrical energy does a 40 W light bulb use if it is on for 12 hours?
40w=.04kWh.04*12 hours=.48 kWh
How much heat energy will a 40W light bulb give out in 3 minutes?
Joules = watts x seconds. Just convert the minutes to seconds, then multiply.
Will four 50 watt halogen bulbs give as much light as eight 40-watt incandescent bulbs?
If the fixture was the exact same, and one held a single bulb and one held a double bulb then NO. The light given off bulbs is marked as wattage when you look at the package. So a 100w bulb has less light than two 75w bulbs together, because the two equal 150w.
