Warm or cool LEDs

[nigelmercier]

I've just received from boatlamps.co.uk an LED replacement for the 10" fluorescent tube in my galley ... but they forgot to send me the fitting instructions ...

While trying to find some instructions for JumbleDuck I came across a post regarding warm vs. cool lamps: http://www.practicalcaravan.com/forum/technical/47166-replace-floro-tubes-with-led#366825

Not an authoritative source obviously, but the poster has at least researched the topic.

 

[MagicalArmchair]

Interesting read, thanks for posting (d'oh, all my LEDs are warm, including over the chart table )

 

[[70521]]

Thanks, it was a question that I wanted to ask before next winters list of jobs to start on.

I wonder what is the best red over the chart table?

 

[Twister_Ken]

I wonder what is the best red over the chart table?

A good Burgundy?

 

[MagicalArmchair]

http://biology.stackexchange.com/questions/2075/does-red-light-preserve-your-night-vision

http://www.flashlightreviews.com/qa/nightvision.htm

https://en.wikipedia.org/wiki/Scotopic_vision

Gads, I'll stick to the Burgundy... (edit: Apologies as above are a bit off topic, just got reading and found it all rather interesting as to why we use red light and why it works)

 

[ex-Gladys]

Been using LED cabin lights for nearly 10 years, and whether the light is urban myth or not I would NOT use Cool LEDs any more...

 

[lw395]

Warm and Cool LEDs all vary from manufacturer to manufacturer, and are generally getting better as time goes on.
I still prefer a proper halogen for close work though!

 

[rogerthebodger]

To me it depends where and what you are lighting. I have a combination of warm and cool white in diffractions locations. Generally I have warm white in the saloon area but cool white in areas where detailed work and good light is needed like in workshop and nav station. I have converter most of my fluorescent lights to stick on strips of leds in some I have both cool and warm white with on-off-on switches and in others, nav station and cockpit it have cool white and red led strips again with on-off-on switches

I think the conversion tubes like jumboduck posted are over priced I just removed all internal fittings and stuck on the strips and resoldered the strips to the existing or new on-off-on switches

 

[RichardS]

I bought 3 cool-white LEDs from Boatlamps to replace my 3 external 10W G4 Halogens. They are so bright that I decided to change all the internal G4s with the warm-white version which are slightly lower lumens but I could see would be plenty bright enough. I ordered the new G4s but when they arrived I could see that the light was exactly the same as the cool-whites.

After discussion with Boatlamps it turns out that the wrong lamps were despatched in the original order and they were warm-white. I thought that they didn't look the slightest bit blue. I must be colour blind!

Boatlamps offered to swop the original three but I'm happy with having warm-white throughout so I've kept them.

If you need to tell the difference, the cool-white LEDs are lemon yellow, the warm-white LEDs are orange. I suppose that orange is a colour which filters out the blue part of the spectrum but also inevitably reduces the output slightly.

Richard

 

[KevB]

Personal taste for me is warm white. Cool white is more like nasty fluorescent in a hospital waiting room.

 

[Twister_Ken]

I've gone warm throughout and am pleased.

 

[geem]

Personal taste for me is warm white. Cool white is more like nasty fluorescent in a hospital waiting room.

Which is why I have them in my engine room when I am carrying out a bit of surgery...

 

[Tim Good]

I tried cool in the workshop and galley but its just horrid. I agree also that the blue end of the spectrum does carry more energy and damaging long term.

I did try the T5 30cm tube LED lamp the other day from BoatLamps and it is not as powerful as a single 8w fluorescent tube. At £30 each it is pointless to replace so I'm looking at other options.

 

[ghostlymoron]

I have a single cool white fitting in my cabin. It's plenty bright enough but the light is a bit clinical. I couldn't find a warm white fitting the right size and price so I'll stick with what I've got.

 

[mobeydick]

Cool white is more like nasty fluorescent in a hospital waiting room.

And makes you look like you belong there.

MD

 

[PetiteFleur]

Thanks, it was a question that I wanted to ask before next winters list of jobs to start on.

I wonder what is the best red over the chart table?

I tried a red led for my chart table BUT you could not see the magenta coloured flash on the buoys on the chart...... so have reverted to the original white light.

 

[Foxy]

Obvious room for introducing some fun here .....so for amusement only....: Warm is, in reality, the blue one which gives off a higher colour temperature (in terms of kelvin) and cold is actually the yellow one which burns at a lower temperature.

Just saying

 

[Lon nan Gruagach]

Obvious room for introducing some fun here .....so for amusement only....: Warm is, in reality, the blue one which gives off a higher colour temperature (in terms of kelvin) and cold is actually the yellow one which burns at a lower temperature.

Just saying

Yeah, well, Its God that messed up, making fire red and ice blue.

 

[Lon nan Gruagach]

Yeah, well, Its God that messed up, making fire red and ice blue.

or maybe it should be fire thats cold and ice warm.....

 

[nigelmercier]

Warm is, in reality, the blue one which gives off a higher colour temperature (in terms of kelvin) and cold is actually the yellow one which burns at a lower temperature...

Confused? Warm white is around 2700K, cool white is around 4000K, daylight around 6000K.