It’s easy to dismiss phrases like “energy saving” and “energy efficient” when talking about light bulbs.
They are so small, that it probably doesn’t make much of a difference what type you use, right?
Well, have you ever calculated how much energy your light bulbs consume or how much money it costs to light them? I didn’t think so but don’t worry because John has already done it for you!
The following example is based on a real situation and calculation that a customer has made:
John is quite energy conscious, he constantly has to keep telling his family to “please switch off the lights!” but his words are falling on deaf ears, as he would always find lights on in rooms where nobody was using them. He has to pay all the bills including electricity so he wanted to find out what else can he do to cut down on electricity usage. In the past he has heard something about LED bulbs being energy efficient but he never knew if they were worth the extra money they cost or not so he did a quick calculation:
John has a nice kitchen, similar to the above picture.
The kitchen is fitted with ceiling down-lights in which 10 x Gu10 50W halogen bulbs are used for the main lights. Whilst 6 more bulbs are used under the top cupboards and other fittings around the kitchen. So that’s 16 bulbs in total.
John has a typical life and although he is at work all day, his wife is at home most of the time. His kids come home around 3:30pm and he himself arrives home at around 6pm.
He found that his wife would use the kitchen lights for around 1hour in the morning as she prepared lunches and breakfasts for the family. She would also use them for around another hour midday as she made her own lunch and began the cleaning routine. Finally the lights would be on from around 5pm as she prepared the evening meal and they would stay on until around 9pm.
So on average use, the 16 bulbs were being used for 6 hours a day…
The Calculation – 50W halogen vs 5W LED
He worked out the power consumption like this:
Sixteen 50W bulbs running even an average of 6 hours a day means (16x50x6) = 4800W (4.8kW) electricity consumption a day.
Electricity costs approximately 12.5p per kW so every day John pays 60p just for the lights in his kitchen.
It sounds quite reasonable!
However, John took the calculations further and worked out the cost for per month and per annum:
£18.25 / month (a nice dinner)
£219 / annum (an iPad mini)
Hmm.. getting interesting right?
He then worked out how much it would cost to run the kitchen lights with 5W LED’s instead:
16 x 5 x 6 = 480W (0.48kW) power consumption a day.
Electricity cost 12.5p / kW so 12.5 x 0.48 = 6
YES! Only 6p a day to light the kitchen – not 60p – and the think about the rest of the house. Thats a cost of only £21.90 a year and a huge saving of £184.5 / annum. (He will still tell his kids to switch the lights off though!)
A few pounds more would cover the cost of an iPad mini, so that’s one christmas gift sorted! All if he switched his kitchen bulbs to LED’s.
The Switch To LED’s
After this revelation, he then began to take in to account the other lights in the house: bathroom, living room and bedrooms, all of which were rooms that the children and his wife left bulbs switched on many times each day. The winter is coming too, so lights will be switched on earlier and for longer he thought…
John knows what to do now but do you?
If you are in the same situation as John, with old types of halogen bulbs burning though your money, it’s time to take the next step and switch to LED’s.
To help you take this step, we have created an offer for you:
Sounds good right? Winter’s dark nights are coming so don’t delay.
Offer ends 02.10.2015
Check Ledlam’s other offers now and you can save even more!
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