The Nyko UFO comes with four parts, the main light and three coloured "UFO" attachments. Instead of the usual coil design it has a curved neck made of clear plastic with a spring in the centre to allow it to be bent into the shape you want. At the base of the unit you will see a small circuit board with 2 green LED’s and 2 red LED’s on each side. These will flash alternately when the GBA is switched on. There is also a pass-through port for a link cable.

Recalling the worm light available for GBC, there were two different models. One had the LED as it was while the second had a piece of plastic over the light to diffuse it over more of the screen and cause less of a bright spot. The UFOs serve the same purpose, allowing you to choose between a dimmer light with less reflection or a brighter light.

I found that leaving the UFOs off lit up plenty without the need for extra diffusion and there’s a smaller area of glare. The UFOs act more as a dimmer, and the reflection area is actually larger. Using the blue UFO is the best as the darker colour shows up less on the GBA screen.

Positioning the light near the top of the screen was best; it is possible to keep the light right up in the black border. This works especially well with the bare light, as the thin neck can keep out of the view. The UFOs tend to get in the way of the screen.

As long as the light is in a horizontal position, more than enough of the screen is lit up. It can even be left off-centre where the link port is. With a little twisting it is easy to reposition the light to a suitable spot.

Even though the reflection is worse, I still use this in dim conditions as it brightens up the colours and makes the game look that much nicer.

Batteries will last for about 30% less time than they do without the light. An interesting observation is when batteries are starting to become low, the power light on the GBA will flash green and red for a little while, owing to red LED’s using less power than any other colour.