Y'know I'd love love LOVE an e-reader with a red light.

Not a warm white light, not an orange light, not a yellow light; a RRRED light. Like, the colour red. As in red LEDs.

Decades of insomnia only alleviated by using a rooted phone with a red-subpixels-only option have ruined me for anything else.

(and I resent that to get Proper Night Mode on a phone you've got to root it, that really should be a legally mandated requirement on anything with a screen tbh)

Out of all the e-ink e-readers ever made, guess how many you can read at night without throwing your melatonin secretion all out of whack and keeping you awake? Zero. Not a single one. Even though it'd be easy as hell. Even though out of all the LED colours, red is the cheapest and uses the least energy.

What the hell, ereader manufacturers?

Y'know the more I think about this the less inclined I am to replace LEDs and the more inclined to sneak a couple layers of rubylith in there, that'd at least be very easily reversible

Alright story time, Rubylith: How I Cured My Insomnia With Masking Material

I was an insomniac as long as I've remembered. Had it real bad, medicated and everything. Slept through fire alarms. Lost jobs to lateness. After hours of tossing and turning and fretting over how little sleep I was gonna get and how tired I'd be the next day I'd give up and grab a book in hopes that it'd help me sleep; it'd quiet my mind down, but turning on a light would make my body all excited, because I'm part moth I guess.

Round about when people started taking smartphones to bed with them, all the "I've spent years researching the effects of artificial light on circadian rhythms" people started shouting OH MY GOD DON'T TAKE YOUR PHONE TO BED WITH YOU, and we all shouted back LOL I'M TAKING MY PHONE TO BED WITH ME WHO ARE YOU THE BED COPS and took our phones to bed with us, and that's when the midden REALLY hit the windmill.

"Blue light keeps you awake!" they shouted.
"Lol" we replied.
"No we mean it, it's REALLY bad!" they wheedled.
"Lmao" we explained.
"Look, even a SINGLE blue photon hitting your retina can WRECK your night's sleep! One photon! Just one!" they cajoled.
"Sorry, what was that," we guffawed, "I was busy buying an alarm clock with big blue LED numbers on it. And an iPod dock, because that is the style at this time."

Anyway I was already an insomniac so no difference I guess, I'll read me ebooks on me phone, fine. Does seem a bit bright though even on min brightness, tell you what, I'll set the text to like a dark grey on a black background. Cor this is a good book, I'm gonna read this until 4am or whenever my eyes start hurting.

YEARS pass without incident or difference until my mate takes me to a star party. A very dark place, lots of quietly-excitable blokes with glasses and laptops and they're all very eager to let you look through their telescopes and tell you stuff, a Generally Mild Fun Chill Time - but a very dark time, the sort of darkness where everybody's eyes are used to it, the sort of dark where if someone lights up a smoke everyone blinks and scowls and goes "ah" just at that tiny lighter flame. I peek over the shoulder of one of these star dudes and see an entirely-red Windows XP and say "Oh cool, you've cut the green and blue all together huh?"

He's like well, red light doesn't destroy your night vision, you can look right at a red light and still see in the dark afterwards.

I say, huh. And I remember that big old metal torch my dad got from the army/navy shop, the one where you could swap out the lens for a red one. And I notice he's got electrical tape over his hard drive and power lights too.

And I say so what'd you do, cut into the video cable and short some stuff to ground, he says nah and he peels back the corner of his screen and blinds me with Horrible Blue Light and as I'm blinking it away he says this is just a sheet of Rubylith, and if this were a film I'd have that moment in slow motion, "Rrrooooooo

beeeeeeeeeee

lllliitthhhhhhh"

~~~RUBYLITH~~~

A clingfilm-thin plastic sheet originally used in lithography and screen printing because it cuts so clean and nice, Rubylith is called Rubylith because it's Really Really Incredibly Red. Its Incredible Redness means that you can put a layer on top of a monitor and it'd turn your whites to an arterial pink and your brightest blue to the deepest inky indigo; another layer and the blue is black, it's gone, your whites are now deep blood reds. Your #ffffff is a #ff0000, there's Nothing But Red.

I must clarify, I'm not talking about sunset mode here, I'm not talking about tinting your screen amber - I'm talking MUCH further than that. Imagine a red heart shape made to look shiny with a white highlight; you wouldn't be able to see the highlight, it'd render the same colour as the rest of the heart. Hell, if the heart were against a white background you might not see the heart at all, because it takes red, green and blue to make white, and there's no green or blue. There's no pink in Rubylith land, there's no amber, there's no orange, red is red and white is red and pink is slightly dimmer red. Clouds are blood red against a black sky. This isn't your phone's eye-relief night mode, this is the complete eradication of two thirds of colour data and damn being able to determine what you're looking at.

Anyway, there was a bloke selling big sheets of Rubylith on eBay for a tenner.

(it's gone way up, he's asking $20 now)

Anyway I saw this astronomer and his Rubylith and I set my phone's ebook reader app (moon+ Reader if you're interested, I've tried literally dozens and it's still the best) to red text on a black background, and aye it looks like a goth's MySpace but it works, I'm getting sleepy as I read - until I get a notification or there's a picture mid-text and I get the DANGEROUS BLUE PHOTONS and I'm awake again.

Cut out a wee bit of this lovely red wonder material and slip it into my phone case at night, though, and we're sorted. I'm not worrying about how late I'm gonna be up, I'm just reading my Terry Pratchett or Spider Robinson or Michael Marshall Smith or whoever, and half an hour later I'm getting sleepy, I'm having problems focusing, my mind's off in that pre-dream playground and I put my phone down and I'm off, I'm in the land of nod, I'm sleeping like a Functional Normal Person and it's absolute magic.

I'm constantly amazed at how well this works, and how I spent most of my life being perpetually late for things because No Sleep, before I put two and two together.

Now these days I use rooted phones where you can cut the green and blue with a one-tap widget on the home screen, but if you can't root your phone or you need to red-only an iPhone or a laptop or smth then Rubylith is WELL WORTH YOUR CONSIDERATION MY FRIEND.

I'm not saying it'll definitely 100% cure your insomnia like it did mine, but it's cheap as chips and 100% worth a try; worst that'll happen is it doesn't work and you've got some interesting crafting material that cuts really nice with an x-acto knife for the next time you wanna make a Christmas card or something.

Related to the Rubylith Story, expand this thread and check the replies to see a way to Virtually Rubylith your Apple phone.

Android users with a rooted phone, the app "Color Changer Pro [root]" by Omega Centauri Software can do the same thing with a wee one-touch widget on your home screen, and then you can set up Tasker to return the screen to normal at like 5am or whenever.

Android users with LineageOS or one of its pretenders, check Settings -> LiveDisplay -> Colour Calibration and put the green and blue all the way left; unfortunately they won't go all the way to zero but stop at 10%, this is why I'm gonna root my FairPhone and get rid of this E/OS crap and go to proper LineageOS next month.

Also can we take a moment to appreciate how truly mockable this test pattern is? That there's a set of friggin' PASTEL colour bars. Aye cheers phone geniuses, that's nae use to man nor beast

Further addendum: Rubylith doesn't turn light red, that's impossible, it filters out blue and green light; if you've got an alarm clock with white numbers then Rubylith will turn them red, if it's got amber numbers then Rubylith will turn them dark red, if it's got green or blue numbers then Rubylith will have exactly the same effect on them as a roll of black electrical tape :)

You know, it's a real shame that all those "Blue light keeps you awake!" biologists and others made such a Big Bad Blue Mistake when they were ringing that bell.

Because they all went "Blue light keeps you awake!" thinking that everybody surely knows that that includes your white reading light and the white text on black background on your phone and the warm-white lightbulb in your bedroom, they assumed it was common forefront-of-the-mind knowledge that white is made up of red and green and blue.

Aye we were all taught that in school but it was bold of them to assume that we'd *remember* that bit of info unless we work in very coloured-light-related industries or have coloured-light-related hobbies or interests. Your average person isn't gonna see like pink text on a black background and go "Oh aye, that's a problem," they're gonna go "What problem, that text is pink, not blue."

Should've said "Anything BUT red light keeps you awake!" but I think the ship's sailed at this point tbh

I'm only 40 and my head already works like an old Wurlitzer jukebox. The song's definitely in there aye no doubt, but if it happens to be at the back of the carousel when you ask for it then it's gonna take a minute for it to spin round to the needle. And the more records I stuff into this thing the longer it takes to do a full spin.

That's why I sit bolt upright and go "Oh my god the blue-light-bad scientists are talking about white light too, they're just really really bad at communicating" at like midnight and then start to go back to sleep and then go bolt upright again fifteen minutes later and go "Science people IN GENERAL aren't great at communicating, and that explains a WHOLE BUNCH" and then go back to sleep and then in the morning when I'm eating my toast I go "Science people don't think about Jukebox Head!" and then later as I'm drinking my coffee I go "Or maybe they DO, but their awareness of Jukebox Head is at the back of their OWN carousels, so they're not thinking about it when it comes time to talk about their science!"

Anyway this is my brand new General Unified Theory Of Everything and as you can see it's both completely watertight and easily explainable to people of any age, especially those who have never seen or interacted with a mechanical jukebox, you're welcome

@ifixcoinops Wonderful analogy for those of us who understand the mechanisms. Thanks for the thought.
@ifixcoinops I’ve often found that advice to be… kinda not useful for me personally? Because the things that keeps me awake at night are more about *what* i see on the screen before bedtime; if i stumble upon some bad online takes its gonna keep me awake. I used to play miitopia in bed and it made me fall asleep so good because i built up a pavlovian response to that game.
@foervraengd aye that's legit, I only do ebooks on my phone in bed these days, no games or chats 'cause they'll keep me awake no matter the colour
@ifixcoinops yeah chatting is a no for me. Miitopia is possible for me because the gameplay is essentially all on auto except for when you wanna hop in to heal the characters. There’s been a lot of times where ive waken up in the morning and seen the game still being on next to me.

@ifixcoinops well it's impossible for rubylith, operating via absorption.

Red-emitting fluorescent materials are totally a thing though and will reduce photon energy quite handily through re-emission :)

@ifixcoinops It's probably of use for people with deuteranomaly.
@BernieDoesIt that's the uncorrected, filters-turned-off test pattern :P
@ifixcoinops See, mom? This is why I haaaave to be on Mastodon! 😁
@ifixcoinops I need some of this stuff for my bright as fuck alarm clock

@eniko @ifixcoinops

I don't know why the manufacturers do stupid things like making them super-bright.

The last time I replaced my alarm clock, the only one I could find was green, and it has a switch that goes "bright, really bright, nuclear fireball". So I took the case off it and slipped a piece of dark film in front of the display, works great.

If you don't have a source of dark film, go to a copy place and get them to "copy" to a transparency with the copier lid open so it's black.

@cazabon @eniko I used to work in electronics retail and can say with confidence that the things that get done to a product to make it look good on the shelf of a shop are often Very Very Incompatible with actually making a good usable product that'll work well in your house

@ifixcoinops @eniko

This aligns with my experience.

Blue LED alarm clock is dumb enough as it is - whoo, blue LEDs, they were cool and new in 1995, but even then a dumb idea for a nighttime clock - but green? Worst possible choice; your eyes are most sensitive to green light.

#Engineers would love to build #good, #useful #products. But the #marketing #wanks get in the way with stupid requirements and "suggestions". They should be "first against the wall when the revolution comes" - D.A.

@eniko @ifixcoinops Alarm clocks are evil. Imho. Knowing what time it is just makes it harder to sleep:(
@ifixcoinops this did just prompt me to get some grey filter film to put on some random bedroom blinkythings.
@skyguided blinkythings in the bedroom is a recipe for a Bad Time
@ifixcoinops I have some of those goofy phillips hue lights and people can mock me all day but there is NOTHING as soothing when I’m stressed as a color scheme that makes one feel like a fry under a heat lamp. It seems to relax the dogs, too.

@ouinne @ifixcoinops I have RGB lightbulbs in the ceiling, but now I’m thinking of getting that for the table light as well. I wonder how well I can read a book in just red light (I don’t like reading on screens if I read books).

Now I have a bunch of silly ideas around colored lights :)

@ifixcoinops out of interest, what app did you use on a rooted phone to get it to completely cut the greens and blues out? Night Light mode just isn't cutting it.
@iMeddles It was called Colour Changer Pro, formerly known as rootdim iirc
@ifixcoinops Thanks! Found it, I'll give it a try tonight.
@ifixcoinops
I worked in a college newspaper darkroom last century, we used rubylith for lots of stuff... and I don't think I've even seen it mentioned since :)
@ifixcoinops
Excellent recommendation, thank you. Even if I don't use it on my devices I think I might be able to find some use for it...
@ifixcoinops Holds the current record for longest post I’ve seen in #Mastodon 😁
@ifixcoinops There's a lot to be said for low-tech solutions. 👍
@ifixcoinops awesome, thanks for this I did not even know this material existed.
@ifixcoinops iPhone settings > Accessibility > Display & Text Size > Colour Filters – you can make grey scale, which might be better than some colours becoming black under Rubylith.
@ifixcoinops huh, the screenshot of the grey scale filter applies still has the underlying colours. Should have turned the filter off before posting! I think I’d have to photograph it or maybe screen share and screen shot from there?
@ifixcoinops I wonder if you could get enough juice from the usb port to rig up a red led that just points at the display :-P.
@kelbot A light bright enough to light the screen evenly without lighting the whole room is a big ask for a clip-on. I'm not getting out of this predicament without getting me soldering iron out am I :P

@ifixcoinops

Well... I've always used my e-paper-based readers without the built-in lighting, so they just have whatever ambient light I'm using.

Are you using a backlit LCD reader?

@cazabon nah, epaper with crummy clip-on booklight wrapped in rubylith
@ifixcoinops damn now i want this

i have an ereader with e-ink that i set to the dimmest setting i can without turning the backlight off, like 3% or 5% (the slider is very hard to control) and if i have a migraine i wear sunglasses to look at screens

and i haven't rooted my phone or figured out how to do so properly but i did try to de-google it as much as possible and installed an fdroid app that has night mode and lets you control the dimness and gets it way dimmer than the built in setting

i wonder how hard it would be to take an ereader apart and swap out the LEDs for different ones

i know the page turning mechanism utilizes LEDs as well, by sensing your touch via the light being blocked, so hopefully it would not interfere with that
@ifixcoinops I prefer to just not use the built in light on my old kobo
@ifixcoinops that's a warm color choice
@Ikeor I'm a generally warm person
@ifixcoinops surprisingly, iPads have a red-only display mode hidden in accessibility settings, and a super-dim mode as well. Although they’re not really e-readers
@tomfinnigan @ifixcoinops ooh… good spot! Just added a couple of shortcuts to turn Rubylith mode on a couple of hours after sunset and back off again around sunrise. Dunno if that requires iPadOS 17 though.