MagneTek-Universal Watt-Reducer Slimline ballast

Came in a freebie slimline fixture...well 3 of them actually. I bet these are original judging by that Metalux sticker on the label and the fact that 3 of 4 lights have these whereas the odd one out has an Advance Mark III that looks like a replacement for sure as it has spliced leads.
The cropping feature cut off part of the label unfortunately...and the photo quality isn't ideal since all I had was my Samsung Galaxy tablet. But see the shadows? That's another one of the fixtures being tested and providing light:)
At 1.34a it's not full power (full power is 1.45a) but this one is post EPACT judging by the encircled E logo, so of course it's not! It still runs 60w lamps better than the full power Advance I've had for awhile now!
All these are currently sitting in storage until I get some lamps. I intend to get 75 watt ones, but if all I can find are 60w I'll settle for those. But I haven't even decided what to do with these fixtures yet.