Flood light

A flood light is a furniture item that produces light in a wide radius.

Acquisition

Flood lights can be constructed once the advanced lights research project has been completed. Each requires 50 Steel and 600 ticks (10 secs) of work modified by the construction speed of the builder.

Summary

Flood lights require substantially more steel to build and power to run than standing lamps (50 steel vs 20 steel, and 100 W vs 30 W). Although flood lights provide a larger light radius, the maximum light intensity is still only 50%. That is, one cannot be used as a grow light and, if using Anomaly DLC, they aren't any better for containing entities. As a result, the increased light radius is the only reason to choose a flood light over another type of light fixture.

Advanced lights

With the Advanced lights research, the power cost of flood lights are halved, to 50W of power. Note that flood lights require Advanced Lights to construct, so they will only require 100W if you acquire them some other way. Lights can also be changed to a variety of different colors, which have no gameplay effect. Lights of different colors will blend together.

(pre 1.4) Combining different colored lights for a "rainbow" feel to your colony. Light % is not additive above the maximum that single colored lights provide.
Interface for choosing a lamp's color.
Gizmos that appear when selecting a lamp with the advanced lights research completed.