I replaced the ballast in a single-lamp (36 in. - T12) fixture over the kitchen sink using Philips Advance Centium Model ICM-2S40-N. I wired this replacement ballast according to "diagram 21" below (ignoring the 2nd lamp on the "blue wires).
The lamp works perfectly. So, what problems can I expect by not wiring according to "diagram 39" below?