Warning & SWAT lights Ask An Expert Request a Quote Request Service Or give us a call: 1-888-606-9415 Loading Dock Communication Lights, also known as red-green lights, communicate with both the truck driver outside and the forklift driver inside. These lights help to reduce the incidence of major accidents due to trucks pulling away from a dock before loading and unloading is complete. The red-green lighting system is an effective and simple way to let truck and forklift drivers know when cargo has been off-loaded and when the truck can depart safely. Dock Communication Lights are a vital part of a safe warehouse facility, helping to prevent major accidents that cost lives and money.