> I am searching for a floody headlight with 18650 and 18350 tube
no 18350
High CRI, 18650 headlamp with custom interchangeable lenses and LED modules:
Nichia E17A/E21A Skilhunt H04RC Group Buy
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a note about 500 floody lumens…
bigger floods use more battery power on target, than tighter hotspots,
because the same total output is spread over a wider area
example
both lights set to the same total lumen level
you can see the tighter beam is brighter on target (within the smaller hotspot)
therefore I think you might find considerably less than 500 lumens on target, sufficient to work in a cabinet, without wasting lumens flooding a wider area than necessary.
a narrower beam will use less battery power to make the target as bright as a wider beam does
this is the opposite of the truism that multi LEDs are more efficient than singles
they are
but
if the beam is floodyer, it is dimmer on target, at the same Total Lumen output
stands to reason that if I spread 100 lumens out over twice the area, it wont be as bright as 100 lumens focused into half the area… right?
Moral of the story
Tighter beams are more efficient
Wider beams waste more power.