That's a lot of questions, hoss. In the future, please separate individual questions into paragraphs, makes it easier not to miss any.
An early water change won't impede the cycle as long as you remember to dechlorinate the new water and to re-dose ammonia right away. The bacterial colonies will continue to grow as long as there is an excess of ammonia. It won't necessarily help either, unless your pH is dropping, then it will help to replenish your buffer. This can also be done by adding a little bag of crushed coral to the filter while cycling.
If by conditioner, you mean dechlorinator, then, yes.
Liquid test kits are more reliable than test strips.
When you're done fishless cycling, stock the tank to its full, final stocking level, or as close as you can. At the end of the cycle you should have nitrifier colonies far bigger than necessary to handle a full fish load, but they'll die off the meet the available waste produced, so if you try stocking like a fishy cycle, the first addition will be fine, but after that you'll basically be mini-cycling with each new addition.
Don't worry about the pH in terms of a specific value. While you're cycling watch out for a drop because nitrification acidifies water and if you have weakly buffered water, then you can get a pH crash which will set you back. After you're done cycling and do your giant water change, whatever pH you have will be fine as long as it's stable. Just acclimate the fish slowly.
Incandecent lights are more at risk of shorts than fluo's because both + and -connections are in the same fixture, so a drop of water can short it. In fluo fixtures the + is at one end and the - at the other, so to short it you'd need two streams of water to simultaneously strike both connections, no likely, but all the fluo fixtures I've seen have a glass cover anyway.