I goofed around long enough trying to decide how to light the lower deck of my new layout. I am using 1x3 and did not have a lot of room for lights. Didn't like the idea of shop lights.... so I went to the hardware store and found these! They clip on to the wire by unscrewing the back, placing the wire above the pins and screwing the back plate back on. They were $1.79 each... romex was about $7 bucks... and then some 15w and 20w bulbs. I suppose I could use screw in flourescent if I wanted to... we shall see. I guess I will do something similar on the upper deck.