The lights are 4' LED, motorola brand, I believe it was 4700 lumins each. you can link them together for longer lengths. 
 
Yes, 6" 3600psi concrete.  I have not decided what to do with floor yet, what are you thinking?  Because of the size, everything I see is quite expensive.  I can tile or carpet it for the price of epoxy coatings and such from what I see so far. lol..
		 
		
		
		
		
		
		
		
		
	
	 |