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It's dark, Blue or Red?


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Traditionally night lights have been Red but technology has now given us Blue.

 

If you were staring from scratch and the cost was the same would you fit blue or red for night lighting?

 

Anyone used/got Blue? Would you keep it or change to another?

 

 

 

 

 

 

 

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Yes theatres, I'd forgotten them.

 

They are just for night or mood lighting Kevin. So they want to be subtle and throw out just enough to get around the boat with. Flashing would drive me nuts, which is why the stereo head that came out of her had duct tape across the front of it, it flashed... once.

 

The blue does look good but a play last night would suggest the red 'light up' more than the blue. They were the exact same lights just different in colour. I dunno if the extra light was just Red doing more then Blue due to a spectrum thing or it was our eyes seeing Red easier. But the post play debrief had blue as the big favourite.

 

Rather than have 1 or 2 big lights I'm having a series if tiny micro lights. Better for coverage, less eye damage and looks ways sexier.

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So really it just comes down to what mood works best for ya - blue light or red.  Best ask the missus!

Ask the missus, hell no.

 

But I may ask the hot MILF over the back fence. At least the 1/2 hour near diatribe on colours will be mellowed by magnificent but highly inappropriate thoughts I'll be having at the same time :D

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when the cop car 1-1/2 ks down the strait has pulled another sucker over and his lights are flashing you pick up the red long before the blue.

A grizzle of mine is a red card seems to be the only colour available on the Contest 101's. I find that mine is almost impossible to read at night, I have replaced the light with an led, which helps, but it is still very difficult to read.Back in the day they all used to have black cards with white No's, I don't remember having difficulty with them?

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I can remember a big discussion on night light colour many years ago on CF. The information that came out in that discussion was that the actual colour, Blue through to Red, has no affect on maintaining your night vision. And in fact, having a very low intensity white was actually no different and in some respects even better.
However, just a couple of weeks ago, I read some research about this in regards to something completely different. And I thought, hmm, interesting and maybe of importance to what light you use for a Night light. So basically, Blue light keeps you awake. The research was actually about Blue light, which even though it looks white, there is a lot of Blue in the White of Laptops, Phones and so on, actually causes the Body to reduce the output of Seratonin. This causes you to struggle to get to sleep for at least a hr and up to two hrs after you have been viewing one of these. While at the other end of the spectrum, Red light produces Seratonin and makes you sleepy. It was suggested that for those that struggle with sleep and especially if you have to view screens before Bed, is to wear Blue Blocking sunglasses for the last hr.
So I wondered then if Blue light might be better to use due to it helping keep you awake. Where as Red may cause you to get sleepy.
 

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Blue catches fish Knotty, so when you're sailing along at night up off Tut's you might get the attack of the flying fish. And then you need a nice big frypan, so you see using a blue light actually ends up weighing more.

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Oh gawd, with everyone knowing Red is faster and now Blue is heavier and keeps you awake, the dilemma is getting intense :D

 

I never considered the physiological aspects of the lights, that's a interesting angle Wheels. 

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Ah. I do have the ability to strobe my masthead light should I want to draw attention. It's one of those Opti..Octi...errrr sexy and clever ones IT sells.

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I'm still of the opinion that red light does not affect night vision as much as light of other wavelengths.  As I understand it, the chemical in the rods in our eyes (which are used for vision in low light conditions) is insensitive to red light, and therefore does not "reset" our night vision as does light of higher wavelengths.

 

I'd be doing a fair bit of research before departing from the norm of red lighting for night vision.

 

human_cone_action_spectra.gif

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Red is a tricky colour and one that disappears fast in 1/2 light so that could be right WB.

 

I'll find a friendly optometrist and see what they say. I'll wire a few up tonight and put them head to head and see what we see ..... or don't.

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Had a play and it was interesting.

 

NOTE: We noticed that what our eyes saw isn't what the camera (Sony Z1 with 20.something megapixls) saw.

 

Got 2 lights, NEWT's they have on them. 30 milliamp. One red and one blue. Wired them up the same and connected to the same battery. 12V

 

Set in cockpit like this, the photo used a flash. The white square in the middle is a pad of paper. The lights are 2mt apart.
L1.jpg

 

No flash. The group call was the photo shows more output from both lights than our eyes saw. The call was also both seems to put out about the same amount of light.

L2.jpg

 

Just the blue

L3.jpg

 

Just the red. Note here the blue light has a hint of output going on. That was Otto holding the end of the blue wire in one hand while holding the wire for the red on the battery with the other, so he is conductive and it shows how low the power can be with these things.

L4.jpg

 

Inside the cabin just lying face up on the bunks the same distance of centerline. There are no gloss surfaces and most have a layer of dust on them so there is bugger all 'reflection'. Again the photo shows more than our eyes saw but the consensus was both put out about the same, the red a bit more if anything yet the photo suggests the opposite.

l5.jpg

 

Just the blue.

l7.jpg

 

Just the red. Total agreement that this photo shows WAY more light then all our eyes saw, and I mean WAY as it a hell of a lot. Same with the blue to a point but nothing like as much as the red.

l6.jpg

 

Conclusion - A bit 50/50 really. The team thought the blue was cool but a little harder (intense?) on the eyes than the red, the blue also 'lit up' things more visibly. The red was more softer on the eyes and it's coverage went further even though it didn't 'lit up' things as much as the blue. Neither could be used for reading unless real close. Both were a lot brighter than expected for 30 milliamps and they both were too bright for night lighting if your eyes could see the fitting itself. The output was fine though.

 

So at the end 1 preferred the blue and 2 the red. There wasn't any clear conclusion either way from the assembled mob. The only one was no matter what we we go we can not have the light fitting in a sight line, we must have that positioned where it can't be seen from the steering stick. Even though these lights are tiny when talking power the pinpoint at the source is harsh and would bugger your night vision fast. That can be seen in the cockpit photos verse the cabin photos where the lights are behind the 2 black squares a.k.a the bulkhead.

 

Personally I'm leaning toward the red as it is softer so over 8 hours has to be (????) nicer on the eyes, or so my totally uneducated theory goes. But if I was going for 'cool' it would have to be Blue all the way, no question... or maybe a combo of both, that was very sexy.

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Red doesn't affect night vision as much as blue/white. This is the reason special forces ops run at night use red lights inside planes heading to drop zones - guys with guns need to be able to see stuff to shoot it up.  There was a great write up on this on Quora (I think?) I'll see if I can find it. 

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Brilliant stuff Km... err pun intended.... ..

 

There is one additional thing to test IMHO. Which one Blue or Red affects your night vision the least. I don't know how you test that. Maybe sit in the dark looking a page of text you can only just read, then turn on each light and off again. can you see the text in the dark again, or how long does it take before you can see it.

 

I agree what the camera "sees" is quite different from what our eyes see and I know my eyes see much better in the dark than my wife's do for example so it is also very individual.

 

Cheers tb

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Good call Tim.

 

I'll set them both up then sit in darkness for 5 mins then turn one on and see what I can see using a book. Turn it off and repeat with the other colour.

 

I know from just last night alone if your eyes can see the source they start doing unwanted stuff, or at least mine did but I do have a small photophobia (light sensitivity) issue which wouldn't help.

 

Yeap red has been the usual night light but I've seen stuff that suggests Blue is now an option as it is now an option where until recently blue wasn't.

 

 

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IIRC from my days in the Army, it takes 30 minutes or more to get your full night vision, so KM your test may take some time!! Oh and you can lose your night vision in less than 1 sec. They used to teach you to close one eye when you heard the sound of a flare, so as to preserve at least some night vision. All the military night lighting was red. That was 30 odd years ago though, so could be different now....although peoples eyes are the same!

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Good point IT.

When night flying we allow time for the eyes to adjust before tearing off dowm the concrete. And make sure we don't look at Nav lights or similar.

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