Having fun with some new gear.
These were lit with a Nikon SB600 bare from camera right. The trick is gelling the flash to make it look more like sunset. I think I had either a 3/4 or Full CTO (color temperature orange) gel on it. You balance your flash output and your aperture to get the correct exposure for your subject. Once you have done that, you can pretty much move your shutter speed up or down until the ambient looks how you want it. In this case I had a higher shutter speed to make the background and sky darker.

Water drops. Lots of fun. Here is the tutorial if you would like to try it for yourself.