Map Tester,
I bought this charger from zbattery.com.
http://www.zbattery.com/zbattery/12bc1000d-1.html
It works great. Red LED means "charging"; green LED means "charged". Continues trickle charge as needed. You can leave the battery connected as long as you want without overcharging. My 5 ah battery recharges in a couple of hours from a little under half charge. My 7 ah battery doesn't flip on the green light. If I unplug and replug the green LED comes on. It is an old, much used battery; I think that has something to do with it.

I did not get the $55 54 LED white truck backup light. What I have ordered is a 48 LED white MR-16 replacement for about $18 plus shipping. Seemed like a better idea because it is much less expensive and will pop into one of my existing lights. No need to figure out mounting. I will give a report after trying it out. Based on claims I have seen for other white LED lights of 12, 24, and 32 LEDs I am hoping this one produces light equivalent to a 15-20 W halogen. I will let you know how it works out.
Regards,
Raymond