I like the overall effect, but I think it would've been much better if you tried to get at least something in focus. I have the same camera, and I shoot 3 pictures in a row when I have this little light available... one of them will be more or less sharper than the others. Also, Photoshop is great for adjusting levels when you shoot in real dark... so you would've not needed to have a 2 second exposure.
And I will be over-critique now... the sewage cap lets me know this isn't the dream place I thought of when I first saw the picture.
Titus