Darth Vader Night Light (Adam Joseph, 1983)
As awesome as a Darth Vader night light sounds, the dark lord's dark helmet isn't exactly an ideal mate for an internal bulb. The light only shines through the thinner parts of the mask, and even within that, it turns the mask all sorts of totally non-Vader colors. It's perfect if you're trying to recreate the scene where Luke burns his dad's corpse up for closure, but if you're just trying not to trip over stuff during the after hours, find a different form of novelty illumination.
Besides, night lights are usually placed in two rooms and two rooms only: the bedroom, or the bathroom. Few want Darth Vader's eyes on them while they sleep, but even fewer want Darth Vader's eyes on them while they shit.