LED lamp brightness?

[C8PPO]

Can anyone advise on how bright these would be

http://www.lightsaver.co.uk/shop/showitem.php?item...

in the context of being under-cabinet lights to illuminate the worktop?

I can't get any info on an approximate equivalent wattage. Some LED lights are pathetically dim, whilst on the other hand I have a 12v mountain bike light which, at 900 lumens, would shame many a car headlight!

I'm loking to replace a couple of fluorescent striplights, one about 2ft long, the other 2'6", with 6 of the above LED lights???

Thanks.

[Raverbaby]

For under cabinet lighting they will probably be ok, although I doubt they will be as good as your existing fluorescents for light output.
I saw a similar bank of 4 LED's in Lidl today for £9.99, might be worth a look if you've yet to decide.

[Neil135]

I'm not too sure how bright they will be they look like normal LED's rather than power LED's. Look for 1W or 3W power LED's

Have a look here http://www.aurora.eu.com

[Simpo Two]

Pity they can't quantify everything in watts - it seemed to work perfectly well for a century or two. A 100W lamp was brigther than a 60W lamp. 'Power' means nothing.

ETA: I guess if the voltage is different then watts is a bad example; maybe lumens or watt equivalents.

Edited by Simpo Two on Saturday 20th February 10:12

[Henry-F]

Light output has never been measured in terms of watts, lumens is what you actually see. A normal filament bulb (or lamp) gives off a certain amount of light relative to the power it uses measured in Watts and we have become used to associating say 60 watts with that amount of light (or rather number of lumens).

Halogen lamps, fluorescent lamps and LEDS all give off a different of lumens for a given power use so it gets harder to judge how bright a particular lamp will be for it's power consumption. We recently changed 1000 watts of halogen down lights for 312 watts of compact fluorescent downlights and get much more light, a higher lumens level.

The company selling those LED lights would appear to be pretty crap in that they don't offer any information at all to help you make an informed decision other than some regurgitated Chinese manufacturer`s information - I see you get 9 LEDs "free of charge" with each light . As a rough rule of thumb comparing halogen to led lights the conversion factor used is around 8, in other words a 3 watt LED lamp will produce approximately the same light levels as a 24 watt halogen lamp. These could potentially be less than 1 watt.

What you really need to know is the lumens for a given distance and angle. My gut feel is that those LED units would look like piss holes in the snow compared to your under unit fluorescent strips.

We are experimenting with GU10 compact fluorescent lamps to replace 12 volt halogen lamps in down lights around the house and I don't think they are quite there yet. We've started looking at GU10 coloured LEDs for a Jacuzzi gazebo but suspect we will end up using halogens there as well but we'll see.

Henry

[Simpo Two]

Henry-F said:

What you really need to know is the lumens for a given distance and angle.

Agreed - or for given distance per square cm. The power consumption is a different matter.



NB: What was wrong with lux?