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Which bulb


Dave Bebb

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All all just need a bit of advice please a am going to change the bulbs on our boat from Halogen to Led but do not know what power to buy they do 1watt 2 3 5 6 10 and 20 ,the ones a have in now are 20 watts Halogen and use a bit to much power from the battery's when we our out on the Cut thanks 

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Several online vendors give the approximate equivalents so if for example one says the 20W halogen is equal to 3 watt LES then most vendors' products will be similar. The LED equivalent may only be given against tungsten filament (GLS) bulbs. I that case from memory halogen use about half the power for the  same light output so you would want to look for whatever is equivalent to 40 watts GLS. However 20 watt halogens seem very bright to me. we used 10 watts or 21 watt  GLS.

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1 hour ago, Tony Brooks said:

Several online vendors give the approximate equivalents so if for example one says the 20W halogen is equal to 3 watt LES then most vendors' products will be similar. The LED equivalent may only be given against tungsten filament (GLS) bulbs. I that case from memory halogen use about half the power for the  same light output so you would want to look for whatever is equivalent to 40 watts GLS. However 20 watt halogens seem very bright to me. we used 10 watts or 21 watt  GLS.

It is best to look at the brightness in lumens rather than the power consumption when comparing lamps.  Incidentally, halogen lamps are often quoted as using 70% of the power of old fashioned bulbs, so are not much more efficient even if labelled 'eco'.

It's worth buying one or two lamps for testing, or borrowing them from another boater for test purposes.  One thing to watch out for is radio interference, since it is not uncommon with LED lighting especially when the radio signal is weak.

To find suitable replacements for the styles of bulb used on boats, you might need to look at a specialist supplier,  for example:  http://www.bedazzled.uk.com/12v_LED_Bulb_Replacement.htm

 

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18 minutes ago, Richard T said:

We used Aten Lighting for our LEDs with no problems

https://www.atenlighting.co.uk/

If you have any 30cm flourescent tubefittings I modified them without buying expensive LED equivalents by stripping the gubbins out and then buying lamp holders and LED lamps.

Good company to deal with.

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4 hours ago, Tony Brooks said:

 However 20 watt halogens seem very bright to me. we used 10 watts or 21 watt  GLS.

Before I converted the units in our last boat to be able to take LED based units, we had moved from normal to Halogen bulbs some years previously.  We had gone for 20 watt where we thought we needed more light, and 10 watt where we felt we didn't want it that bright.  In practice 20W of Halogen never seemed "twice" as bright as 10W of the same, and I can certainly remember reopening some of them to see what they actually contained, because the difference didn't seem dramatic.

Subsequently just about every light we have converted in each of 3 boats has come from UltraLEDs, (at least hald the price of Bedazzled, and not one problem with any of them).  From memory we have gone for about 15 LED capsules in most cases, and only gone to 20 plus where we want really bright - and they are really bright.

To some extent it depends on the reflective and refractive properties of what you are fitting them in though.

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2 hours ago, alan_fincher said:

Before I converted the units in our last boat to be able to take LED based units, we had moved from normal to Halogen bulbs some years previously.  We had gone for 20 watt where we thought we needed more light, and 10 watt where we felt we didn't want it that bright.  In practice 20W of Halogen never seemed "twice" as bright as 10W of the same, and I can certainly remember reopening some of them to see what they actually contained, because the difference didn't seem dramatic.

Subsequently just about every light we have converted in each of 3 boats has come from UltraLEDs, (at least hald the price of Bedazzled, and not one problem with any of them).  From memory we have gone for about 15 LED capsules in most cases, and only gone to 20 plus where we want really bright - and they are really bright.

To some extent it depends on the reflective and refractive properties of what you are fitting them in though.

As I explained above, halogen lamps are not much more efficient than ordinary incandescent bulbs and the 'eco' designation is no more than marketing spin.  The colour temperature is a bit higher and the life could be 50 or 100% longer.

As you say, the fixtures make a significant difference.  Hopefully we will see more fixtures designed for LEDs and if properly designed the LEDs should not need to be replaceable.

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