Pulsar Max 720W Horticultural LED Fixture + Ballast KitPulsar Max 720W Horticultural LED Fixture + Ballast Kit Pulsar's 720W LED with a clever trick up its sleeve: if you've got an old Pulsar 600W Digital Power Pack from an HPS setup, you can use it as the driver for this fixture saving you money on the ballast side and keeping serviceable kit out of landfill. For growers upgrading from HPS who already own Pulsar gear. Why growers choose the Pulsar Max 720W: Reuses existing Pulsar 600W Digital Power Pack