Lightning tower

Shoots lightning on enemies which then spread to nearby enemies. It requires Power (from Nuclear Reactors) to operate.

Tips

 * These are your strongest defense, spread them out where you need them the most.
 * These are most effective against large groups. Put them where there are the most zombies coming.
 * These are best kept the same level as your Arrow Towers.
 * These have a high upgrade priority. Upgrade these before other defensive towers.
 * These are best used when your base is against a wall or corner, and large masses of zombies reach your walls simultaneously.
 * Can deal with screamers fairly well, so make sure to place in areas weak against them.
 * If you have a lot in your inventory and you are getting a lot of zombies stuck in one spot, then you can put a lot of Lightning Towers there to give the zombies one huge ZAP!

Characteristics at different levels
 original reference