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lighting costs?

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Posts: 183
VIP Member
Topic starter
(@flannery_k)
Estimable Member
Joined: 13 years ago

Greetings
I am trying to calculate lighting costs for a new house in Portugal. does anyone know the cost per Kwh? thank you.

if any use to anyone, here are approximate costs of different bulb types at different watts.... at a cost per Kw of .17

I am not an electrician but to the best of my knowledge (and have checked answers with a few energy calculators and seem to be accurate....)

So ONE 50 w halogen bulb
Lighting for 8 hours a day
7 days a week
At a cost of .17kwh (check your electricity tariff)
Costs: €24.75 for the year

If on for the same period of time, One LED: 5w
costs €2.47 for the year - I recently bought them for 7 euros, they last about 10 years.

If on for the same period of time ,An energy saving bulb of 14w, will cost €6.93 for the year. (ie equivalent to 50w halogen)

If on for the same period of time, An energy saving bulb: 23w (equivalent to a normal 100w bulb)
Costs: €11.38 for the year.

If on for the same period of time, An ordinary 100w light bulb:
Costs About €50 euros for the year!! (€49.50)

If you have halogen ceiling lights, you can directly replace the GU10 bulb with an led bulb.

12 Replies




Posts: 547
VIP Member
(@puro_pt)
Honorable Member
Joined: 13 years ago
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Posts: 7054
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(@chas-linda)
Illustrious Member
Joined: 16 years ago

As Hugo says go www.edp.pt. You have an English option, but certain operations only work in the PT version, EDP also recommend Internet Explorer for a better link. There is an electricity useage simulator if you can fathom it out. Prices depend on plan and billed monthly or bimonthly, TV licence non optional €1.25 per month.

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Posts: 183
VIP Member
Topic starter
(@flannery_k)
Estimable Member
Joined: 13 years ago

much appreciated...looking :?

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Posts: 1016
 gpf
VIP Member
(@gpf)
Noble Member
Joined: 17 years ago

The longevity of CFD and LED bulbs is being massively overplayed, so much so that UK councils are now budgeting for the disposal of the trace amounts of mercury in CFDs. So you should budget for replacing 1 out of 4 or 5 bulbs per annum...

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