Re: Are LED Bulbs reduce electricity bills
I have trouble locating the websites you mentioned. Found 2.
ledcentre.uk:
Their bulbs are very low powered (and therefor very dim). Note they would not state the lumens the bulbs produce.
The ones that say 5mm will be at half brightness in 6 months and useless in a year. STAY AWAY!
I use 2W bulbs as a nitelite.
Which leaves you with the 4.7W ones. They should be between a 15W and 25W incandescent in brightness.
Bright white is cool white.
simplyled.co.uk:
8w, 500-600 Lumens => 62.5 - 75 lm/w
6w, 360 Lumens => 60 lm/w
5w, 170 Lumens => 34 lm/w
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Compare to what I can buy at Home Depot in Canada:
http://www.homedepot.ca/catalog/led-bulbs/172458
Cree (These have just been released in the last month. Latest and greatest.)
6W, 450 lumens => 75 lm/w (40W equivalent)
http://www.homedepot.ca/product/6-watt-40w-warm-white-led-light-bulb-1-pack/827152
9.5W, 800 lumens => 84 lm/w (warm white) (60W equivalent)
http://www.homedepot.ca/product/95-watt-60w-warm-white-led-light-bulb-1-pack/827146
9W, 800 lumens => 89 lm/w (cool white)
http://www.homedepot.ca/product/9-watt-60w-daylight-led-light-bulb-1-pack/827149
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I would stay away from small outfits that obtain their No Name bulbs from unknown sources and stick with mainstream well known light bulb companies like Philips, GE, Osram, Sylvania, Toshiba. Do not forget Amazon.co.uk.
Luminous Flux 330, Wattage 4 watts, Incandescent Equivalent 30 watts, £10.79 Note E14 -base - for comparison with the 5W bulb at simplyled. 1 less watt but twice the brightness.
http://www.amazon.co.uk/dp/B0085WFOGU/
Luminous Flux 290, Wattage 5.5 watts, Incandescent Equivalent 40 watts, £8.40
http://www.amazon.co.uk/dp/B005J3DGJA/
Luminous Flux 350 lumen, Wattage 6 watts, Incandescent Equivalent 32 watts, £14.86.
http://www.amazon.co.uk/dp/B007K8LYFU/
Luminous Flux 470, Wattage 9 watts, Incandescent Equivalent 40 watts, £10.24.
http://www.amazon.co.uk/dp/B005OYW64K/
Luminous Flux 600 lumen, Wattage 10 watts, Incandescent Equivalent 48 watts, £16.99
http://www.amazon.co.uk/dp/B007K8QM4I/
Luminous Flux 806 lumen, Wattage 12 watts, Incandescent Equivalent 60 watts, £28.99.
http://www.amazon.co.uk/dp/B004FUFGXW/
Luminous Flux 1050, Wattage 17 watts, (listed as 75W equivalent in US/Canada), £39.99
http://www.amazon.co.uk/dp/B007WJD1U8/