Convoys s2+ help needed with lens colour and placement.

LED Flashlights – General Info
1

Hey guys

I bought two convoy s2+ to use for my bike.

First issue is how can I make the lens red so it acts like a back up rear light. I have a pretty good rear light anyway but this can be used as a solid light whilst the other flashes. The lens needs to be red.

How do I go about getting a red lens or is there another way??

2

Maybe find something that’s transparent and red to stick over the head of the light. I’ve seen people go as far as using scotch tape and a red marker. I would suggest this but you’ll also need a driver that won’t exceed 2.2 amps.

3

+1

With a filter you would be wasting a lot of light. The Red-output emitter would be more efficient, and could run at a lower driver current.

Alternatively, you can buy red transparent tape used to temporarily patch broken taillights. You could adhere a layer of that on the glass lens.

4

Thanks for the tips guys.

5

Just remember that whatever you stick in front of the head will get very hot at high output

6

Cheers will bear that in mind

7

IMO you should look for something that diffuses the light. perhaps a cone, kinda like the Nitecore LA10. My reasoning behind this is so you can be visible from the side as well.

8

That’s a good suggestion. I have the cone filter thing for the s2+ just looks a bit odd. It’s also pretty thick so diffuses to much light. It means I will have to run the s2 at a higher power.

9

Authentic Nitecore NFR23 23mm Red Filter @FastTech

If the S2+ head is still too wide to fit, you can take its lens out and straight replace it with the filter's one. :-)

Cheers ^:)

10

Thanks. Will look into that. Any other suggestions. The side viewing on a bikey light is important. If the above came with red sides like the front that would be perfect.

11

Mmm:

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I can see 200Ω resistors on each side, presumably in series with some sort of led (5730s?). That means driving current oscillates between slightly below 50mA at 12V, and somewhat above 100mA at 24V. A good compromise.

Could be easily modified for use with a li-ion by removing the resistors and driving the leds in parallel with a simple 350mA driver, like this one: 350mA 1-Mode LED Flashlight Driver Circuit Board

It must be noted that 5730s are rated for up to 150mA continuous (≈0'5W), so they may get a bit toasty on those limited cooling ability enclosures. This is all conjecture, though.

Cheers ^:)