shutter speed:30 seconds
f#:18
ISO:200
Looks good but maybe open up your aperture a bit so you can burn more light into the image. And using a piece of rolled up black construction paper as a snoot can help keep the light only on the areas you want. Also try adjusting the white balance so your light stays white.
Here are the settings I used for these pics:
ISO-200
F/10
15 sec. exposure
ISO-200
F/10
6 sec. exposure