Modding Blazer N4020X 4 LED driving lights

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JasonJ
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Location: Bay City, MI
Modding Blazer N4020X 4 LED driving lights

I bought these for about $20 (purposely looked for cheap lights); the plan is to mount them to the front of a Club Car golf cart for some light out front to see while driving at dusk and at night, as well as to be more visible to others. I didn’t expect much, but connecting these lights to a 12-15v power source indicates they are not very bright (I found a YT video from mfgr stating 43 lumens), and the light is very scattered – I think as a result of the very fractal like reflectors.

They only draw 120mA per 4-LED light… which is obviously not much at all. Clearly a generic Chinese cheap emitter in these… but increasing current should yield considerably more OTF lumens. The problem?

I can’t get the darn things apart! Three screws, one main one in back, two on the side for the bracket that screws into a metal piece I can see inside. The hell?

They are similar/same to these: Blazer N4020X Driving Lights

Any idea what I may find if/when I open these up? I’m hoping there is just a basic sense resistor I can work with to increase current draw.. if they’re direct drive, only pulling 120mA for four emitters… I’m kinda screwed as far as increasing output without replace the emitters and a driver inside each. Which.. I guess I could do. They look like I could almost swap the guts from a C8 into these with a wider reflector, 12v driver and call it a day.

I would have bought something that was better out of the box, but I needed something I could take up to the cabin with me to install today; not 2-5 days form now, otherwise I could have just ordered from Amazon…

Anyone been in a similar scenario before? Thoughts on modding these on improving them?

They don’t look bad at first glance..

No clue what kind of emitter this is:

Edited by: JasonJ on 08/10/2017 - 10:32
cadmium
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Joined: 08/06/2017 - 18:13
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Location: California

The light is probably press fit together like a lot of cheap flashlights. Usually these require destructive methods to get apart. You either have to punch it out from the back or drill a hole into it and pull it out from the front with a screw. The LEDS look like 3 die 9v. I have seen these before in cheap indicator lamps that were driven at around 20mA. The ones I have don’t have a thermal path and aren’t designed for high power, so these are probably already over driven. Putting more current into them would probably burn them out.

Flashlights are the nerf guns of the energy weapon world.

JasonJ
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Last seen: 9 hours 12 min ago
Joined: 05/12/2014 - 12:00
Posts: 348
Location: Bay City, MI

Thanks for the feedback…. I suspect you are correct. Once I had installed these about two weeks ago onto the cart, I found that despite being really bottom barrel in terms of the emitters and reflectors, they actually do the job. I believe the claimed 43lm output from the mfg is accurate. They have a very dispersed flood pattern, but two of them about 24” apart puts enough light about 15-20’ in front of the golf cart to make it drive-able in the dark.

I’m just going to leave them be… easier to just buy better lights in the future for this application, especially now that it’s already wired up.