lordraiden,
With all due respect, I think that you are going through way too much work for too little reward.
I also like to tinker, and did something similar (before I was introduced to Li-Ion rechargeable, and eneloops (and newer duracell/duraloop) NiMH rechargeables.
I bought a few commercial emergency exit or stairway lights (Lithonia brand) they are powered by 4.5 AmpHour 6 volt SLA batteries. I pulled the incandescent bulbs that would kill the battery in about 90 minutes, and wired in a 24 LED satellite camping tent lantern. I forget, I think it will give about 20 - 25 hours of about 35 lumens. It comes on when the power goes off, and it has a push button on and off switch. They claim 20 hours on 4 AAs, which is about 2.5 amp hours, and you know that the claims are somewhat over-stated.
I have gifted two sets like that, and still have two at home. I also have a few of those power failure flashlights in different rooms of the house so that every room will get SOME light in the event of a power failure so that where ever you are in the house, you'll be able to navigate to get additional light.
I started a thread asking
how many lumens, and how many batteries would it take to last a week of power outage for a family of four. I believe that it became a great thread. In that we covered many power related things including heat, sump pump back-up, fans etc. While many are comfortable with less light, it seems to me that with-in each group of four there will be at least one who REALLY prefers at 100 lumens of light, at least in the main room. I'm personally in that category.
Within that thread I calculated how many 18650 batteries could be charged from a car battery, and how long it would take for the car's alternator to recharge the power taken from it. I also did the calculations for AA eneloops.
Pretty much any 18650 battery with a 70-100 lumen setting can deliver that many lumens for 5-7 hours.
And a light like the sunwayman D40A (one that takes 4 AA batteries) if it has a 70-100 lumen setting should also run for 5-7 hours. The D40A doesn't output in that range, I think its' is 30 and 220 lumen settings.
The point being, if you have a car, and a charger that you can plug into it, you can get by nicely for a week or longer with rechargeables, and with more light than those puck style lights will supply.