I just picked up a couple of boxes of the replacement bulbs (Itm #937748). These are true plug n play and leave the ballast in the circuit. The ones in the prior link above have lead in wires that skip the ballast. Would have preferred those for a new light fixture installation. The ones at...
From the installation instructions, the ballast is disconnected from the circuit. Each tube is hardwired via a quick connector to power. Maximum number of tube connections per quick connector looks to be seven.