stupid question what side is the front ?
With rectangular LED lights it is down to orientation of the light and the width of the sides that usually detemines which side is the front.
It is generally considered that the longer length facing you is the front as generally shown in pictures and adverts.
Although in reality, is there really any side which is to be considered more the front than any other?
The HS 1 is slightly different as the business end of things are located in a single quadrant, in the picture above it is located in the top left corner.
Aesthetically speaking the front side could be considered the left hand side of the picture above , due to the part of the light which holds the holographic difuser, which is also slightly deeper than the rest of unit & runs along this length.
It also depends in how you orientate it and which way you put in the difuser if the difuser has an 80 deg x50 {rectangular focus} or a 80 deg x 80 deg lens {square focus} and the shape of your room be it square or rectangle.
In my conclusion, there really isn't a front but rather a center and the center is off center and positioned in a corner, further to that, there are further variables which can be created with various difusers of varing degrees of focus on their X & Y axis.
So lets say you have an 80 X 80 difuser in a square tent, you will want the quadrant which has the leds and difuser in it in the dead center of you room.
I you have lets say two HS1's in a 1.2m x1.2m space you will ant to hang them side by side, using 80 x 50 difusers in each slightly angled towards each other and the 80 deg sides running parallel to each other .
If you have a wardrobe/cabinet 1.2 wide across the front and 60cm deep then you would hang the light so the quadrant holding the led and difuser was in dead center and use an 80 x 50 difuser orientated so that the 80 degree side ran in the same orientation as the widest part of the cupboard ie. width across the front.
is that any help?