V99 is dead on it. I called it dry, because I remembered there was no acid floating around and no holes to peep through

The battery recovered over night, cranked fine and the empeg didn't blank out when I breaked.
However, on the way back, headlights on, after a few miles it started happening again: every break, empeg blanks out. Interestingly, it didn't do that for the first few miles, only as I got close to home. Is my for now single 300W amp drawing too much current together with the headlights? What if I switch the brights on? How about if I upgrade to overwattage bulbs? Do I need a bigger alternator? Bigger battery? Or do I just have to wait a few days until the battery has fully recovered from the drain?