I switched back to the Butterfly mantle, and it works
better than the Coleman mantle. And you CAN regulate the light output
of the Butterfly by simply raising or lowering the pressure in the tank!
There is a bleed valve to drop the pressure. Set to a low pressure,
the Butterfly is almost silent and will put out enough light on the
dining room table to easily read with - no problem at all. And it will
maintain that pressure by itself for hours, and the burn time should
be well over 18 hours.
Pumped up enough to reach the red line on the pressure
gauge, the lantern is about as noisy as a Coleman, BUT it puts out an
extremely bright light that lights up the entire patio very easily.
As the lamp is hanging high, with the reflector in place, the light
is radiated down over the entire area, and one could cook or work with
that light easily. Fuel consumption at this rate is about 8 to 12 hours.
Pumped up only 2 marks, or halfway to the red line
on the gauge, the light is still very bright, easily enough to work
in, read over a wide area, yet the noise level is about half that of
a Coleman. That is where it is set right now, burning out on the patio,
suspended by a 14 inch wire from a rafter, and it's own foot long handle.
It has maintained that intensity for hours, and the pressure gauge has
not moved, so what you set it to in the first place is maintained. I
have bled it down to a lower light output, and it stayed there, and
pumped it back up and it stayed there too.
