That way, you can take long-exposure photos at your heart's content, all that's left is to experiment with the exposure time according to your preferences. I remember that when I was starting with photography, I always wanted to take photos with really long exposure, to have the image as bright as possible without burning it out. But after a short while, I learned that spectacular light and color effects can be obtained with shorter exposure times. I guess that, like in all things, in photography you shouldn't overdo...
EXIF info:
Nikon D90
Lens: VR 70-300mm F/4.5-5.6G
Focal Length: 135mm
Aperture: F/7.1
Shutter Speed: 1.6s
ISO Sensitivity: ISO 200