Sean's Flashlight Site

Arc4+
"Power Regulated" LED Flashlight

This light is no longer in production.

Arc4+ Premium Specs:

# 1 watt, High Dome Luxeon Star LED from Lumileds
# Proprietary microprocessor based power supply. DC-DC buck/boost topology, Power regulation, Calibrated brightness, multi-battery support, reverse polarity protection
# LED optics protected by new .092" AR coated, scratch resistant LEXAN lens
# water proof (depth pending)
# 1x '123' 3V lithium pack with tail switch included (battery included)
# Type III hard anodized Aluminum
# Cobalt Gold positive/negative battery contacts
# Simple, reliable housing construction w/knurled grips
# Other power packs available in the future
# Dimensions with TSP-123 included are 3.2 inches long by 1.0 inches in diameter
# Total weight with 123 cell and clip installed is 2.9 ounces
# 10 Year warranty/30 day satisfaction guarantee
# Made in the USA

Voltage range: 2.0V to 6.75V Power Source: one DL-123 Lithium Manganese Dioxide Light Source: 1.25W white LED, regulated for constant brightness Housing: aircraft aluminum, Type III hard anodize Output: (600 lux at 1 meter for 15 minutes, 300 lux at 1 meter for 2 hours) Beam: (15 degree @ 3dB, 90 degree to shadow, 10 lux diagram) Settable Power Range: 24dB in 15 settings with 1.5dB spacing Dimensions: 1 inch diameter by 3.2 inches long, excluding pocket clip

Primary Features: simple single button user interface, rechargeable battery protection, reverse battery protection without diode penalty, graceful power reduction for weak batteries, thermal management, intrinsically safe design, tint management, software upgradeable
 
 

Here is the Arc4+ with the clip removed.  It includes a "bezel up" clip that is designed to fit very deep
inside your pocket, making it harder to lose.
 

The Arc4 does not use an optic colimator to focus the luxeon LED  Instead, it uses a reflector
that does a much better job than any optics I have ever seen.  It produces a nice tight and bright
hotspot with plenty of wide side spill light.
 

Here is how the Arc4 stacks up against the Arc-LSH, Surefire L4 and L5.
The Arc4 is no longer than it's predecessor, the LSH.  And it is much smaller than the Surefires.
 

In the front is the "original" Arc4+ and next to it is the Arc4+ "revision 2" or "rev2".
The rev2 adds knurling on the bezel, a more efficient regulated power supply and
the knurling on the tailcap has been moved back so the clip rests on the flat area
instead of the knurling itself.
 

Here is a sequence showing the Arc4 at every brightness level (1-16)
The Arc LSH-S is on the left for reference with the Arc4 on the right:

 

Here is the same series in a smaller format:

 

Here is a shot of the Arc AA compared to the Arc4 at level 10:

 

Here is a shot of the Arc AA compared to the Arc4 at its dimmest setting (16):

 

Here are some indoor shots.  The first two are at 7' and the last three are at 20'.

 
 

Shots at about ~45'.
 

Here is a comparison between the Surefire E2e w/MN03
with fresh batteries and the Arc4 at it's brightest level.
The Arc4 holds up quite nicely.
 

Here is a comparison shot between the Arc4+ and Arc4+ rev2 at 10'.