[in development] Lumintop B01 - open for suggestions

Hello my dear friends!

Not all workers at Lumintop are hired full time for BLF projects (even if some of you liked that :p)

one of their teams played with a different reflector and made a prototype:

i really like the shape and button...

the LED is mounted 90° to usual lights

looking into the front we see the square LED reflects in a elliptical shape

resulting in a "wide" beam

i think the reflector is similar to the 400lm Lumintop C01 bike light which i reviewed here: https://youtu.be/yKYNV_90E8s (jump to 7:50 for the outdoor beamshots)

using that beamshape in a handheld flashlight i can imagine benefits from having the light in front of you on the road, and left and right beside

and not wasted upwards to illuminate bedroom windows or treetops ...

The prototype is powering a XP-L with 800 Lumens (180m throw) using a 18650 cell...

what would you change?

  • XP-L or XHP70.2 sized?
  • Cree or Samsung or nichia?
  • 18650 or 21700?
  • USB or not?

tell us in which setup you would buy one - maybe "your" suggestion becomes reality!

reserved

Very interesting….

Looks fairly large so would suggest going with 21700.
USB is always nice (good to have the option even if some people prefer using a seperate charger)

Be nice to see some outdoor beamshots

I really like people getting creative, especially at tech companies. But I really can’t find myself to like that beam pattern. It looks like straight of an 80s car. For the use case you suggest (which I really find interesting, don’t get me wrong) I find the hotspot too circular. Any outdoor beamshots? As I would probably only use it as a bike like if at all I would probably go for 21700. XP-L vs 70.2 I don’t know, it probably again affects the beam pattern, I assume (probably giving it less range). Then again I am probably not one of its buyers so it’s probably better for someone who finds this light exciting to decide its specs.

I suggest 2 LEDs, rather than one —- one on either side of the reflector.
Use slightly different LEDs to combine for better color rendering.

Not my kind of thing but, it’s interesting none the less. Think there was a guy on here last month looking for something similar. Hope he finds this thread.

Wouldn’t that result in a hole in the center of the beam?

I think an unsymetrical TIR can do it better than this stepped reflector

the reflector geometry must be a lot better than this generating an elliptical beam without artifacts that look like a very bad car head light

21700
USB charging on battery PCB
ramping firmware from Toykeeper
no press fit parts like button cover, thread this and screw
no switch on driver integrated (separate board for switch and his LEDs like Astrolux MF01, Q8 aso.)

I’d like to see what the beam would look like with a TIR similar to the Skilhunt H03. Might clean up the beam and be more useful with that oblong pattern. Just a thought.

Carlo Optics even has some elliptical optics that at least to their renders produce imho much nicer and more even results than the beam i see in the beamshot above, e.g. 10234 ( http://www.carclo-optics.com/optic-10234 ) or 10003/L25 ( http://www.carclo-optics.com/optic-10003l25 ) or 10759 ( http://www.carclo-optics.com/optic-10759 )

M4D M4X: Do you know if there is a specific reason why they did not opt for that? Or has anyone experience with those TIRs?

Isn’t this the reflector from their C01?

That would make sense, parts on hand, and in that application there is reason why you would want to cut off the top of the beam.

It’s nice that someone is thinking outside of the box. I’m not so sure I see the need for the beam shape and I’d like to see more outdoor pics to really make a judgement, especially compared with a few more standard beams. The shape of the body as it flares toward the head is elegant. I like it! The texturing looks good too.

For specs, I’d go with 21700 but I’m not sure which emitter. Don’t need recharging for me.

It wouldn’t even work - at all! The reflector is roughly triangular profiled. The top has the LED, the reflector is another side, and the front lens is the third side. In other words, the reflector angles out, so there is no place for another LED at the “bottom” of the reflector (opposite the other LED).

BTW, I like the shape of the “host” but the reflector isn’t something I can imagine finding useful.

@M4DM4X

1. I would actually recommend using an SST-20 4000K 90CRI/5000k 70CRI.
It would the light more throw, and better light quality.

2. 4800mAh for maximum capacity/cost.

3. USB rechargeable for newbies/new users.

They used a very similar shape for their zoomie prototype.

Make the reflector have light op texture. If it’s going to excel as a walking/hiking light with horizontal reach, how about make it a high CRI monster as well? I’m thinking SST20.

I’d like to see a version with 600+ M throw.

Honestly, this sucks big times. What was the idea behind this beam pattern? They should focus on properly soldering the leds onto the MCPCBs of their existing much better concept flashlights. But shape and button OK as Martin said :smiley:

Ugly light with ugly beam. In a bike light I can see a reflector like this being useful but just because I’m used to bike lights with ugly beams. But in a handheld light, as already suggested there are prettier ways to make an elliptical beam.