Custom LED Rear Lights - DIY Project

alastairb

Member
Messages
239
Watching with interest. Will there be fog and reverse lights too, or just the indicators, brake and running light?
Fog , Brake and Reverse will use an array of these 3w star led with the individual lenses showing , i.e not behind acrylic.

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Nice performance from 1 , a bank of them will be plenty brighter than the OEM look.
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Also testing out the spacing between the LEDs and acrylic in the kitchen laboratory

IMG_20240117_132352.jpg
 

Sam McGoo

Member
Messages
1,775
It’s clear that no one in the ‘real world’ understands anything about the work that is involved in a rear lamp.

It takes about 3 years to develop a rear light. We just started a project to launch in Dec 2027. Around 20,000 man-hours, even a ‘standard’ lamp is full of engineering challenges. The tooling bill alone will be north of £1.5m for a lamp like that.

Our laboratory is fitted with around £1m worth of equipment to do full durability, environmental and photometric testing.

To think you can safely replicate any of that on your kitchen table is absurd.

And that's the reason everything in the western world is so ridiculously and unnecessarily expensive. :rolleyes:

Someone (with a vested interest) convinces someone else that the only way to do anything 'safely' is spend a stupid amount of money on it.
Money making is all it is.
 

Phil H

Member
Messages
4,180
And that's the reason everything in the western world is so ridiculously and unnecessarily expensive. :rolleyes:

Someone (with a vested interest) convinces someone else that the only way to do anything 'safely' is spend a stupid amount of money on it.
Money making is all it is.
Many moons ago I was involved with various 'standards' committees, and it was not uncommon to see standards written around a specific company's product thereby effectively writing out the competition - at least for the time being. I'm sure there's a fair amount of jiggery pokery in various industries these days.
 

allandwf

Member
Messages
10,995
A lot of safety issues are perceived, like three points of contact while ascending or descending a ladder. That's how people are trained to use one now, except.. us old blokes we are exempt as it awkward to change a habit of a lifetime thus making it less safe to try and utilise the new method! Sorry to drift lol
 

Adamcot

New Member
Messages
10
And that's the reason everything in the western world is so ridiculously and unnecessarily expensive. :rolleyes:

Someone (with a vested interest) convinces someone else that the only way to do anything 'safely' is spend a stupid amount of money on it.
Money making is all it is.
It’s a shame you think that.

If you don’t see the value in making sure the lights work when you most need them, then I suggest you unplug your rear lamps and see how long it takes for you to have an accident…. I’m not really sure who is making money in that case?
 

midlifecrisis

Member
Messages
16,250
A lot of safety issues are perceived, like three points of contact while ascending or descending a ladder. That's how people are trained to use one now, except.. us old blokes we are exempt as it awkward to change a habit of a lifetime thus making it less safe to try and utilise the new method! Sorry to drift lol
Just make sure that you're still wearing all PPE when you fall including your hi-vis otherwise you won't get the compo.
 

midlifecrisis

Member
Messages
16,250
It’s a shame you think that.

If you don’t see the value in making sure the lights work when you most need them, then I suggest you unplug your rear lamps and see how long it takes for you to have an accident…. I’m not really sure who is making money in that case?
Steady fella. I'm sure that they'll work correctly and be compliant legally . Anyway he'll still be ten foot away from the accident if some dozy s0d crashes into his rear whilst admiring his handiwork.

At OP, do us all a favour and make sure you use red for brakes, amber for indicators and white for reverse.

So glad this isn't a BMW forum as people will be asking 'what are indicators?'
 

Adamcot

New Member
Messages
10
Steady fella. I'm sure that they'll work correctly and be compliant legally . Anyway he'll still be ten foot away from the accident if some dozy s0d crashes into his rear whilst admiring his handiwork.

At OP, do us all a favour and make sure you use red for brakes, amber for indicators and white for reverse.

So glad this isn't a BMW forum as people will be asking 'what are indicators?'

I find these reactions quite amusing. It’s amazing how flippant some people are about road safety, something my industry has worked so hard to improve.

But fair enough, I won’t comment further.

I just hope the ‘dozy s0d’ that runs into him doesn’t do too much damage.
 

Harvey_Tim

Member
Messages
209
It’s a shame you think that.

If you don’t see the value in making sure the lights work when you most need them, then I suggest you unplug your rear lamps and see how long it takes for you to have an accident…. I’m not really sure who is making money in that case?
Why do you think they won’t work when you need them most? - the modern LEDs he will be using are probably a lot more reliable (and brighter) than the old bulbs they will be replacing. I don’t think anyone is arguing that safety is important but I dont see any reason why these would be any less safe or reliable than the original 15+ year old units they will be replacing which probably already have corroded bulb holders and iffy earths etc. and have just as much (if not more) potential to fail when you need them most.
 
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Sam McGoo

Member
Messages
1,775
It’s a shame you think that.

If you don’t see the value in making sure the lights work when you most need them, then I suggest you unplug your rear lamps and see how long it takes for you to have an accident…. I’m not really sure who is making money in that case?

I'm not sure driving with my rear lights unplugged is a fair comparison to someone using aftermarket/modified units. :as001 (2):

I imagine modern lighting (including aftermarket) to be far more reliable than it ever was, especially than older filament units. There's also redundancy if a single light failed. I'd also hope that a driver (especially one with the intelligence to build his own) would notice fairly quickly if one was to fail or a a dash light illuminate (if that hasn't had to be bypassed) or good citizen would tell them like the old days.
As long as the OP's lights aren't too dazzling to those behind and they pass an MOT, I can't see the problem.
Longevity and resistance to the elements will be much less of an issue to an individual than a manufacturer, so that's for him to weigh up.
If he was manufacturing his own headlights, that would require more thought.

I very much agree on the importance of lighting, and its effect on safety. In fact, I drive with my side lights on at all times as a minimum regardless of the DRL on the front, because I also want people to see me from behind. (also it stops the rear of the GT looking like a Mondeo :lol:)
I actually can't understand why that hasn't been standard since the introduction of LED DRL? I've lost count of the amount of people I've seen driving in dusk, low light or rain, without any rear lights on due them being oblivious as their DRL are so bright it probably doesn't even occur to them.

I do think lighting technology has been a revelation for the drivers ability to see in the dark. But I do think we've reached the point where it's a problem for oncoming traffic. So much glare now days, and so many heigh vehicles on the road, makes it very dangerous for those of us still wanting to be close to the tarmac.

Also, Auto lights - how bloody lazy. More reasons for the average driver to not have to think about what they are doing while behind the wheel.