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Available from Flash-Lights.com
The Diamond brand LED replacement bulbs are designed
to be direct drop-in replacements for 3 cell (C or D)
Maglights. This is the new K2 model. It is direct-drive,
which means there is no regulator circuit or anything
like that in the bulb.
The unit itself simply replaces the stock bulb and
bulb holder and utilize the Mag reflector, lens, and
head with no modification necessary. This particular
module is white in color, but others may become available.
Body: The bulbs themselves consist of a metal
collar in which the bulb is built. The collar screws
into the Maglight bulb receptacle, taking the place
of the stock Mag bulb holder and creating a positive
thermal connection to draw heat away from the LED. Inside
the collar is the rest of the bulb, which looks like
a standard PR base bulb.
Bezel/Head: Installation is a snap - remove
the stock bulb and retaining collar and throw them away.
Screw in the Diamond bulb and reattach the head. That's
it! Just make sure to use no larger than a 3 cell C
or D Maglight for any of the bulbs.
Output: Output is in the form of a beam similar
to the stock Maglight. It can still be focused, and
if you focus the light outward you get the familiar
"rings and holes" typical of using a smooth
reflector.
The white light produced by the LED is a higher color
temperature than the stock incandescent bulb and produces
good color rendition weighted more toward the blue end
of the spectrum.
The outlandishly high "throw" numbers in
the table below are the result of the excellent job
that the Maglight reflector does of focusing most of
the light from the LEDs into a concentrated beam. However,
once you widen the focus to create a more diffuse beam,
you wind up with the typical black hole in the center.
Below I have listed the 3 Watt model for comparison.
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Model
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3 Watt
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8400 (91.65)
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4200 (42.00)
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K2, 6¾ Watt |
10,000 (100)
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5300 (53.00)
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All throw readings are in Lux
at one meter. The numbers in parenthesis are for comparison
in the Comparison
Charts.
 
White beam at one meter, Narrow focus, wide focus
Runtime Plot:
Runtime
completed with Rayovac brand batteries. More information
on runtime plots is available HERE.
Switch: Same as standard Maglight.
Seals / Water Resistance: Same as standard Maglight.
If it gets wet inside, just disassemble as much a possible
without tools and let it dry before using again.
Ergonomics: Same as standard Maglight.
Batteries: These modules should only be used
in 3 cell Maglights.
Accessories: In case your light takes more than
3 cells, you can get dummy cells from the supplier.
What I Liked: Simple installation,
Maglight retains all functionality, Practically indestructible,
Emits about the same overall light as the stock 3-D
Mag bulb does initially, but does so for many, many
hours, Won't burn out.
What I Didn't Like: Nothing.
Picky Little Things: Nothing
Conclusions: The Diamond Luxeon
LED bulbs are an excellent upgrade for a Maglight. Produces
more light than the standard 3-D Mag bulb and more than
the new Mag-LED lights and bulbs as well.
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USA and 
Canada