Miss - Short burn time. Away from that point its brightness falls off more abruptly, so that outside a circle roughly one foot in diameter at five feet from the light its intensity is virtually the same. The bright spot is oval in shape and slightly mottled. The light head is protected by a rubber shroud. As a bonus for travelers, the halogen bulb has a standard PR-style base, so if it burns out somewhere in the Third World you can replace it, if need be, with a common incandescent flashlight bulb and still have a working light, though a comparatively dim one.
Maximum intensity indicates the brightness of the center of the illuminated area.
The Ikelite RCD for its brightest bright spot, fairly even illumination and user-friendly case latch. Maximum intensity indicates the brightness of the center of the illuminated area. Physically smallest of the four, the UK400 sacrifices some maximum intensity to gain a smooth, even bright spot with gradually feathered edges, making it the best floodlight of the four. As a result, what you see on the reef is actually there, not painted on it by irregular illumination. The pre-production sample we tested gave a smooth, even beam pattern almost identical to that of the UK 400, though with slightly less maximum intensity.