Help simple question for ppl in the know

[knight2372]

dies anyone know how to work out how much energy a light bulb would use in an hour??? In particular the tld 58 watt Phillips new generation light bulb.... please help

 

[sahelectrical]

i dunno mate but if your looking for long life and low energy use phillips i use in theatres can be used domestic and have a life of 15 years

 

[davelerave]

i think those philips use a fair bit

 

[Deleted member 26818]

One unit of electricity = one kwh.
So divide 1000 by the wattage of your lamp and you will obtain how many units it will use per hour.
It works out about a 17th of a kwh.

 

[telectrix]

or around 1p/hour at an average tarriff.

 

[Deleted member 26818]

or around 1p/hour at an average tarriff.

That's what it used to be with a 60W bulb (I know bulbs go in the ground), I would have thought the price would have gone up some what now.

 

[telectrix]

it's about 15p/kwh looking at our last bill. hard to calc. exact as the first so many units are at one rate and subsequent unitsa at a lower rate. to encourage us to use more, i suppose.

 

[pushrod]

dies anyone know how to work out how much energy a light bulb would use in an hour??? In particular the tld 58 watt Phillips new generation light bulb.... please help

The energy you pay for from an electricity supplier is in kWh or units of electricity - something in the region of 12p/16p per unit now?

So energy (in kWh) = Power (kW) x Time (hours) = 0.058 x 1 = 0.058kWh

or a watt is also 1 joule of energy per sec. So total energy in joules = power(watts) x time (seconds)
= 58 x 3600 (number of seconds in an hour)
= 208800J or 208.8kJ

[3,6000,000 Joules = 1 kWh]

 

[pushrod]

it's about 15p/kwh looking at our last bill. hard to calc. exact as the first so many units are at one rate and subsequent unitsa at a lower rate. to encourage us to use more, i suppose.

All these different charging rates for every thing really winds me up - it's to stop you being able to make simple comparisons on who is costing the least. Phone companies really cheese me off with their friends and family, after 6, weekend only, tied in with internet etc etc etc

 

[malcolmsanford]

The energy you pay for from an electricity supplier is in kWh or units of electricity - something in the region of 12p/16p per unit now?

So energy (in kWh) = Power (kW) x Time (hours) = 0.058 x 1 = 0.058kWh

or a watt is also 1 joule of energy per sec. So total energy in joules = power(watts) x time (seconds)
= 58 x 3600 (number of seconds in an hour)
= 208800J or 208.8kJ

[3,6000,000 Joules = 1 kWh]

No one likes a smart ---........................

 

[Wiredspark]

No one likes a smart ---........................

but do quietly agree with them