Travis Jordan wrote:
What functionality specifically are you looking for in a wall
timer....random on/off periods or fixed on/off periods (how many),
battery backup *yes*...what else?

Here's two wall switch timers that might work for you. Haven't tried
either one, so I can't vouch for their reliability.

http://www.grasslin.com/pdf/et724.pdf
http://www.smarthomepro.com/1122.html

Another option might be to eliminate the wall timer and install a
in-line industrial duty time switch at your electrical panel. Assuming
that the lighting you want to control is on it's own circuit, of course.

http://www.grasslin.com/gmx-e.html