Dark Powers (DP) is a teamplay modification for Half-life 2 Deathmatch (HL2DM). DP adds a layer of strategic area control gameplay on top of the standard HL2DM team play. Spawn points are captured by overloading combine consoles with dark energy pellets AKA combine balls. Spawns can also have attached devices to help their teams, such as weapons and health dispensers.
When you hit a capture point with an energy ball this Control Panel will be displayed. Like the Spawn status menu it lists all the spawns and indicates their team by colour and and status by icon. Clicking a spawn in this panel "powers" the spawn, changing it's state or team.
In this shot we can see the North East spawn is held by the rebel team and ready to spawn players.
The Combine control the South West Spawn, powering that spawn would temporarily lock it, preventing the combine players from re-spawning.