Black
Light
Flashlight Bulb
Copyright By Lynn Mills, all rights reserved
Updated Jan 7, 2009
Bountiful high, Utah Class of 58
To learn how to make a UV flashlight go to, http://www.oocities.org/wwindmills/linkpge/makeuv.html
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This LED will last more
than ten times longer than an ordinary light bulb and
because it
uses so little current the batteries will last many times longer also.
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This is a black light or
more accurately an ultra violet light emitting diode, LED, and a
current limiting resistor mounted in a normal flashlight bayonet or
base. With this light you can turn an ordinary 3 or 4 cell flashlight
into a portable black light flashlight. This will not work in lights
that require a screw in base. The flashlight needs to be a 3 or 4 cell
light. If you use a 3 cell light you need not do any thing but switch
bulbs. If you use a 4 cell flashlight you will need to remove one
battery and replace it with a dummy battery The dummy battery is made
with a piece of wooden dowel that is the same diameter as the batteries
and cut slightly shorter 1/16". Wrap the dowel with a layer of
tin foil and fold the foil so that the ends of the dowel are covered so
when it is inserted into the battery compartment it completes the
connection.
Scorpions glow
bright green under this light. If you use the light to hunt for scorpions be watchful and listen for night foraging rattle snakes. They don't fluoresce! Most laundry soaps,
cotton goods and high quality paper glows bright blue.
This light will make any fluorescent colors glow
brilliantly. You can darken the living room and show your wife, mother
or mother in law the millions of brightly glowing pieces of lint that
she missed while house cleaning but don't expect to get any supper
that night
90% of the light coming
from the LED is invisible to your eyes so never shine it
directly into any ones eyes.