This picture was taken at 9 AM in the morning, it looks like it was dark out because of the camera compensating for the brightness of the LED's.
This is the label that was on the LED strip. It could be bought with waterproofing already done but you can also spray on a clear coat of waterproofing.
The LED strips cost about $20 and the 24 Volt AC adapter was laying around. Here is an advertisement for a 10 Meter strip of LED's like the ones I used.