Save your self some hassel and check out Halloween Prop Building Supplies For The Home Haunter - Monster Guts for simple led eyes. Or spend a bit more and check out index
they have some brand new color changing LED eyes and strobing eyes. I have used both from each place and you cant go wrong. Theyalso have the 9 volt battery eliminators, just plug into 110 and they go all night.
LEDs are low voltage. You can use a low voltage wallwart, they plug into 110 v. and then you will need to hook up a resistor with the LED so it will not burn out from excess voltage. There are many how tos under LED. Also check