Advancedmart LED-050AAA

Light Type: 0.5W LED
Light Class: General / Pocket

The Advancedmart Chromed Brass 0.5W LED-050AAA is a really cute little keychain/pocket light. It has a silver finish, is knurled for grip, and has a clickie switch on the side below the head. The Security Quality LED is one of the newer 8mm 0.5 Watt LEDs and inside is a boost circuit to help with maintaining brightness over time.

The body is made of chromed brass with a silver finish. On the head is a ring of knurling. Machined in the body is a wide band of knurling which is fairly aggressive and provides a very good grip. Another ring of knurling surrounds the tailcap for ease of removal when it comes time for a battery change. The tailcap has a drilled tab for the keychain attachment (included).

At the front of the light you will find a recessed plastic lens with the 8mm 0.5 Watt Security Quality LED inside a smooth reflector. Despite the use of a smooth reflector, the beam is quite nice. Inside the head of the light is a DC-DC boost circuit to power the Security Quality LED with the single AAA cell in the body tube. The circuit also regulates output to some degree, keeping the light from simply dropping off as it normally would without the circuit.

Output is in the form of a bluish tinted beam which has a distinct wide central spot surrounded by a distinct corona. Only very slight imperfections in the beam were found.

Beam at one meter at target center

Runtime Plot: A little short of 3 hours to 50%. At this point output drops off almost completely as the boost circuit can no longer draw current from the now dead battery.

Runtime completed with Duracell batteries.

Switch: Side “reverse” clickie; the light doesn’t come on until after the switch is clicked. Very smooth operation.

Seals: No O-ring, no apparent seals. Keep it dry if at all possible.

Ergonomics: It’s a good size for a keychain light, but it has a little heft. The knurling provides good grip and the clickie is easy to activate with the pad of my thumb. No real issues here.

Size compared to a common 2AA aluminum light

Batteries: A single AAA cell powers the light. To change the battery simply unscrew the tailcap and drop out the old cell. Place a new one in positive first and reattach the tailcap.

Accessories: A keychain attachment is included and attached to the light. A cute little nylon belt sheath is also included.

Important things to note


What I Liked: Tough/impact resistant, Good battery life, Good output, Easy battery change, Lightweight

What I Didn’t Like: Not much at all.

Other Things I Noticed:

Conclusions: Very nice little keychain/pocket light. Good runtime, output and beam. The switch is very smooth and easy to use.