The new maxibright digi light pro select 600w allows you to power 250w 400w and 600w hid lamps with the one ballast using super power modes to give each lamp 10 extra power gives you major light control throughout a plants life features included are surge control soft start technology for longer lamp life and continuing efficient output dynamic frequency control for constant regulated output fast lamp re strike ensures hot lamps start as quickly as possible end of lamp life detection ther