Lamps and optical elements can be changed for different distributions, Hot aiming rotates 365°, tilts 35° and locks in position without tools, Translating center beam optics provides full light output from 0 - 35°, Toroidal transformer provides full light output and very low noise, Installs from below and accommodates ceilings 1/2 to 1-1/2" thick, Easy-lock cams quickly and easily lock housing in position, Installs thru 4-1/2" hole, use hole saw for precise installation, Junction box has (6) 1/2" pry-outs & suitable for (4) #12 thru-branch