Review: EachBuyer Budget Diving Light
This light has been sent to me by EachBuyer as part of their review giveaways. The price was around $20ish and I will review based on the price against its performance accordingly.
DISCLAIMER: This will not be reviewed as a proper Diving Light. I tested it as low-depth waterproof budget light - something to tinker with or simply to add to collection.
The package came with the following items:
- Diving flashlight
- Ultrafire “4800mAh” battery
- Cheap charger with US plug head
- Your country’s adapter
The first thing to do would be to measure the UF battery and/or dispose accordingly. I set my Opus C3100 charger to do discharge test and here’s the result:
A whopping 765mAh!! Obviously the battery/charger combo is useless, you’re better off buying them separately. Now back to the light.
The body came with quite a few nicks. They’re anodized so definitely came from the factory.
The LED is weirdly centered at one time and then off-center the next, what gives?? An obvious case of reflector not pressing the base firmly. The base can move off a little, but we’ll discuss this later during light output testing.
Whitewall shot: High.
Medium and low has the same beam, except with lower output. 
Ceiling bounce output gave the following lumens: 740 lumens at start, 660 lumens after 30s. This shows there’s a problem somewhere, most likely be a thermal sagging due to improper assembly. Time to open this baby up.
List of materials:
- Fastening screw. Pointed at ends, maybe to help you wrestle sharks.
- Thick acrylic lens
- Aluminium reflector
- Screw-in pill (solid).
- Body
- Tailcap
A good thing about this light is that it is SIMPLE. The driver is the regular 5-mode, with 20s memory reset. You can swap with with your favourite driver easily. The tailcap is the On/Off twisty with thick double O-ring. You tighten it - battery makes contact - it turns on. Loosen a bit, it turns off.
Tailcap has a built-in small rope cutter, and a comfortable lanyard.
To fix the light thermal sag issue, all that’s needed was to NOT screw the pill completely (just like a C8). With the pill sitting higher, the reflector can press against the base and provide good pressure and grip. It takes a few tries to get it right but it’s worth it. I soldered silicone wire on the spring per BLF tradition and re-measured the output.
After spring braid and pill adjustment, the light output was: 820 lumens, 790 lumens after 30s.
See? No more thermal sagging and steady ~800lm with easy mod.
Finally, waterproof test. What good is a leaking light? So I dropped it into a bucket overnight. So far so good, nor leaks. Next I set it to blinky, dropped it into ~1m pool and played find-the-light with the kids. Did this for over an hour, and the light still has no leaks.
This is what I like about simple design - there’s less thing to fail.
I planned to put this into a 4 bar compression chamber but it may be too much work for a $20 light. So I decided not to go there and simply publish this: 1m low-depth test - PASS.
So to summarize:
Pros:
Solid
Thick acrylic lens
Rope cutter
Regular driver - can easily be swapped
Cons:
LED base not firmly pressed
Next-mode memory (reset in 20s)
Bad PWM on med and low
Rating:
Unmodded: 2 / 5 (due to thermal sag, improper assembly)
Modded/as host: 3.5 / 5 (simple design, easy to mod, good output, waterproof so far)
Thanks for reading!