Less antisocial front light

Less antisocial front light

Author
Discussion

Liquid Knight

Original Poster:

15,754 posts

183 months

Monday 7th November 2016
quotequote all
I've been experimenting again. The headlight on my bike is brilliant but I have noticed a few issues with it.

When there is no traffic I have it on the high setting aimed straight ahead.

When I notice someone or something I switch it to the low setting and aim the middle of the beam about ten feet in front of me.

The beam doesn't pencil so to a degree I'm still dazzling other road users.

I only want to do that with my back light...



... hehe

My first idea was to dissect an old Fiat Coupe headlight and put a torch bulb in the pencil beam side.



That worked but would be bulky and faff to make mounts and stuff. I thought about using my camera mount and spare battery pack but the torch was 6V and that would be risky on a bike.

I'll stick to the front light I have.

It makes this beam pattern at the moment...



...it's basically a spot light and isn't any wonder why other people find it dazzling.

So I started with duct tape and made a peak.



This improved things greatly.



I peeled it off and used it as a template...



...made it from the bottom of a ice cream tub and held it on with cable tie. smile



Appears to have done the trick. smile

Watchman

6,391 posts

245 months

Monday 7th November 2016
quotequote all
Get one of these for 3 quid. Job jobbed.

C&B SEEN WIDE ANGLE/DIFFUSER LENS FOR 1000/1200 LUMEN BIKE LIGHTS WITH 39MM LENS APERTURE https://www.amazon.co.uk/dp/B00DQ5IGMU/ref=cm_sw_r...

Liquid Knight

Original Poster:

15,754 posts

183 months

Monday 7th November 2016
quotequote all
Watchman said:
Get one of these for 3 quid. Job jobbed.

C&B SEEN WIDE ANGLE/DIFFUSER LENS FOR 1000/1200 LUMEN BIKE LIGHTS WITH 39MM LENS APERTURE https://www.amazon.co.uk/dp/B00DQ5IGMU/ref=cm_sw_r...
Tried one when they first appeared and thought it was useless.

It doesn't pencil the beam at all. What I'm trying to do here is make my bike light like a car dipped beam. I have a 3000 Lumen one for high beam. wink


Watchman

6,391 posts

245 months

Monday 7th November 2016
quotequote all
Your shield is cutting light spill from above. That prism will do much of that whilst giving you a better spread on the road. I'm not sure what value you place in "pencilling" beyond avoiding dazzling oncoming.

SixPotBelly

1,922 posts

220 months

Tuesday 8th November 2016
quotequote all
OP, lights approved to German StVo regs have properly shaped beams. Check out the Ixon range from Busch & Muller. Exactly what you're after, if if read your post correctly.

Agent XXX

1,248 posts

106 months

Tuesday 8th November 2016
quotequote all
You clearly have WAY too much time on your hands biggrinbiggrinbiggrin

Liquid Knight

Original Poster:

15,754 posts

183 months

Tuesday 8th November 2016
quotequote all
http://www.bumm.de/



That's pretty much it. Just trying to cycle to the same standard as I drive. These rechargeable lights are really good but even with the centre of the beam ten feet in front of me they can still be dazzling from in front. I would never drive a car with such a faulty headlight so why cycle?

Stiggolas

324 posts

147 months

Tuesday 8th November 2016
quotequote all
I Like the idea of the peak. What if you made it from shiny aluminium (or covered it in tin foil) would you get more light to the floor? I have the same light and will try this smile

yellowjack

17,078 posts

166 months

Tuesday 8th November 2016
quotequote all
Stiggolas said:
I Like the idea of the peak. What if you made it from shiny aluminium (or covered it in tin foil) would you get more light to the floor? I have the same light and will try this smile
Just what I was thinking. Nick LK's template, glue kitchen foil to the inside of the peak, and see if that re-directs more light to just ahead of the front wheel.

I might have a go myself, with my Bontrager ION700 lamp. Perhaps a piece of old conduit or plastic pipe would work for that as it's a much narrower tube and lens itself. Might have to wait for a rainy day though...

Liquid Knight

Original Poster:

15,754 posts

183 months

Tuesday 8th November 2016
quotequote all
yellowjack said:
Stiggolas said:
I Like the idea of the peak. What if you made it from shiny aluminium (or covered it in tin foil) would you get more light to the floor? I have the same light and will try this smile
Just what I was thinking. Nick LK's template, glue kitchen foil to the inside of the peak, and see if that re-directs more light to just ahead of the front wheel.

I might have a go myself, with my Bontrager ION700 lamp. Perhaps a piece of old conduit or plastic pipe would work for that as it's a much narrower tube and lens itself. Might have to wait for a rainy day though...
Hmmmmm... scratchchin

That could work as well.

I have some proper work to do (sill repair on my Fiat Bravo) before it gets dark enough to find out. smile

Liquid Knight

Original Poster:

15,754 posts

183 months

Tuesday 8th November 2016
quotequote all
MkIV

Good call with the Aluminum foil...



...trimmed an ice lolly stick and stapled it to the edge to keep it straight.



Really good pencil beam and if you mount it at an angle it lights up the verge and path the same as a proper headlight.

Right I'm off to Dragons Den. hehe

davepoth

29,395 posts

199 months

Tuesday 8th November 2016
quotequote all
Why not get one of those beam deflectors you stick to the headlights when you go to France?

Liquid Knight

Original Poster:

15,754 posts

183 months

Tuesday 8th November 2016
quotequote all
New template. wink


Liquid Knight

Original Poster:

15,754 posts

183 months

Friday 11th November 2016
quotequote all
My experimental front light...



...with pencil beam worked well on the way in but on the way home several drivers didn't dip their headlights at all or flashed so I guess being considerate is futile.

It was okay until it fell off. I think something more secure than a cable tie for the MkII prototype. hehe

Liquid Knight

Original Poster:

15,754 posts

183 months

Saturday 12th November 2016
quotequote all
So the MkII



Get an ice cream tub lid. I chose this one as it was very nice and is black inside.



Use the template to cut a section out, graphic side up.



Test fit and...



...mark the rim of the light where it needs to be stuck later.



Cover the printed side with double sided tape and trim a lolly pop stick to fit to the outer edge.



Peel off the tape backing and stick Aluminium or Tin foil to the printed side of the template leaving an 8mm gap on the inner edge and staple the stick to the outer edge.

Stick this to the rim of the light and use a heat gun to make the plastic more malleable and the tape stick better. Hold in place with a cable tie, refit to the bike and you're ready to go.