I saw this posted on *************.com. I like the idea this guy had for the timer. After looking on eBay I found the Lego Kits for much cheaper than retail.
QUOTE spykid33:
I made an accurate timer using the LEGO Robotics invention system. If anyone has this and wants the program I can give it to you ( if it lets me post it) It is accurate to 10 milliseconds.
I had a desk lamp pointing at the light sensor and I made a christmas tree with 2 lights (not included but easy to make from scratch). Oh yeah it is robotic so it is pricey