TOPIC:

Brand new Sylvania installed and brand new battery

Simple fuse box replacement, right? 

I did only one fuse at a time for the sake of keeping it simple and saving myself "the mysterious wire" headache lol

All seemed to go smooth, when completed. It fired up, but now my headlamp, 'high-beam', and 'lamp' indicator lamps flicker, ..flickering gets worse with any throttle given.

Any of you have any idea what I could've possibly done to cause this symptom?

Loose connection, increase in revs increases the vibration and connection make/break.
Could be either a terminal connection or if still on glass fuses a dodgy connection in the fuse. Glass fuses are Chinese made these days and shit quality. 

Went out this morning and checked the clamping ability on the three headlamp connectors and found one that was downright gapped out. Problem solved and once again you Warren had the answer. Thanks man!