Hope this will work.....

Tank covered on purpose since it will be entered for the contest
Basically, the Viper hangs nicely on the back glass, and the distance bet light and water surface is approx. 30cm(~12 inches)...just like the ADA Solar I distance to 60-P water surface.
I wish I could find pictures of the Tek light hanging on the arm, but suffice it to say, it is much heavier than Solar I. Luis and I had a great difficulty in keeping it balanced on the arm. It is not impossible, though. I think we did hang it for a while, using metal clasp to secure the steel wires. But I just didn't like the results for too long.