led equivelant for 5 watt bulb

pcatterall

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The berth lights in my boat are 5 watts so will take a big whack out of the old exides if everyone retires early with a good book! ( and is 5 watts enough?)
I have done some reading ... lumens candles etc and am no clearer!
I know that some LEDs are claimed as brighter than others but what is a rule of thumb for comparison?

What do you consider a good 'reading' lamp power? Are there bayonet adapted LEDs which will suit?

I have the IKEA LED set which were recommended some weeks ago now, they have 16 or 18 leds, would they be suitable? I will try one out tonight.

What are you guys using?
 

bobgoode

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Google Searolf...they not only do a load of different power LEDs but a range of fittings. I would find 5W more a chart table light level and want about 10W for reading...incandescent current about 0.8A. Swop that for an LED from searolf with 7 LEDs or 9 LEDs if you want bright...more light and a c urrent draw less that 0.2A N.B. pick a warm tone LED as thay are much more inviting than a cold one.
 

BlueChip

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I have fitted these to my bunk lights - http://cgi.ebay.co.uk/1-X-MR11-G4-1...4873469?pt=UK_Light_Bulbs&hash=item27b8d7c6fd
They are amazing, not to be confused with the normal multi led lights which I have in the saloon and are very good but nothing like the same.
This beauty is as good as a 20w spot light and gives a really narrow intense beam of light more than enough for reading and close work.
The onlycoment I have is thatthe colour temperature across the beam, so that if you are holding a book as you move it about its a slightly odd effect. I only really noticed it the first night and it doesnt worry me at all.
 

phantomlady

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Have you seen the solar powered reading lamps from ikea??
Don't know about wattage etc but I have one and it's fab - perfect for reading by. Just chuck the solar unit out on deck in the morning to charge up, pop it back in at night and tra-la! there's enough power for at least 6 hours light.
And it doesn't drain your batteries either!
 

noelex

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A typical halogen globe will be about 16 lumens per watt. So a 5w bulb will produce something like 80 lumens.
A good LED will produce 100 lumens per watt so you need about 0.8w to produce the same light. The Led has better light distribution ( less than 180 degrees verses 360 for halogen) but there will be some loses in voltage conversion.
But…
That’s really all garbage most led fixtures use poor quality emitters then exaggerate their output.
The best solution is to buy good quality products. Its easy to get something that’s much brighter than a 5w halogen. Purchase one and if it lives up to the claims buy more.
Sensibulb and Bebbi are good companies to start
 

roger

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Searolf is good

I agree with Bobgoode in recommending Searolf. They have some seriously bright 48 or so patch lights. I use some of these at home. However you do need to watch the mains drivers.
I had one self deatruct when powered by an electronic transformer. I believe this was due to "spikes" from the transformer. LED drivers such as those from Screwfix seem OK.
On a nerdish note these particular lights seem to use laser diodes as I see a regular array of patches round them.
The small round patch types with MR11 terminations at the same are very convenient to use and fine for reading by.
PS LIDL have started to provide good single and tripple LED bulbs in MR16 fittings at reasonable prices. As always you have to catch them when they arrive in the shop.
 
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