A simple industrial light.
Can be turned on/off by right-clicking, or by a Mesecons signal, or by sending a Digilines message ("on" or a number greater than 3, or "off" or a number less than 4; set the channel by shift-punching the light). These lights use Unified Dyes, so you can colorize one by crafting along with dye, or with the airbrush.
I Just Like 'Em
They have a very nice looking model, & compatibility with
unifieddyes
gives them a nice variance in colors. It supports protection mods too, so other players can't leave your areas in the dark.Most of all, they make my helipad look great!