Dive lights using LEDs (light-emitting diodes) provide
a good alternative to traditional halogen/filament
bulbs. According to Britain’s DIVE magazine, LEDs
may not match filament bulbs in output but they do
offer much reduced power requirements and generate
virtually no heat. As a result, they give much longer
burn times, even the inexpensive alkaline AA-size batteries.
This keeps the size down to allow them to be
kept unobtrusively in a BC pocket, ready for use when
needed. The light output is much easier on the eye
over long periods. The LEDs themselves are virtually
indestructible and claim a life of around 100,000 hours.
Underwater photographer Peter Rowlands tested a
dozen LED “torches” (as the Brits call them), and several
ranked 9 out of 10 for superior light output, duration
and construction (basically aluminum or plastic,
which is cheaper and lighter but more prone to flooding
in Rowlands’ experience). Here’s what he had to
say about his top choices on sale in the U.S.:
The Underwater Kinetics Sunlight C8 eLED was
the largest light tested as it takes eight C-size batteries.
The eLED circuitry, like the MiniQ40 eLED described
below, maintains a constant voltage for consistent output
throughout the battery’s life. The lantern design is
much more like a traditional diver’s light and the output
is very impressive, with two power settings to provide
longer burn times. The lens cover is well recessed
and protected by a rigid plastic cover. The molded
handle sits nicely in the hand and the on/off switch is
ergonomically positioned for easy use. If you already
own a C8, you only have to buy the eLED module to
upgrade, and you can use alkaline batteries as well as
an optional rechargeable NiCad pack.
The Underwater Kinetics MiniQ40 looks different from others tested and it is, because unlike the rest,
it has voltage control circuitry incorporated to keep
the brightness at maximum during the battery life.
The front bezel is protected by a rigid rubber cover
for increased impact protection, and a mask strap is
supplied to mount the MiniQ40 on the side of your
head, if required. The main O-ring seal is fatter than
most, thereby offering an increased sealing area. Both
Underwater Kinetics lights in this test are ‘retrofit,’ so if
you already own a conventional light you can convert it
to eLED by buying just the lamp module.
The Aquatec Aqua-Star is a stylish, machined-aluminum
light that would survive life in a BC pocket yet
still be ready for use when required. The front port
is recessed for protection, and the double O-ring seal
is reassuring and easy to maintain. The rotary on/off
switch control is very precise, requiring only a tendegree
rotation and, being at the rear, would lend itself
as an excellent focus light on a camera system. The
Aqua-Star torch represents excellent value for money
and, because of the photographic connection, is my
favorite.
The Dive Rite LED had me fooled at first — then I
read the instructions! The front bezel has to be screwed
down fully counterclockwise, through the on position,
to turn it off. You then rotate it clockwise to turn it on.
This is the opposite of the others tested. The result is
a good design which would be okay to turn on and off
underwater. The seven-LED array provides a slightly
bluer light and the burn time with four AA batteries is
very impressive. The built-in rubber handgrip is also a
nice touch. The Dive Rite LED is a good backup torch
and preferable to the other small plastic ones.
Traveling divers with concerns about baggage weight
limits might find smaller (and generally) lighter LED
lights the way to go.