From the experiment, we should choose a sun lamp with a light distribution that is appropriate for the surface of the room by the light coming out, they must be comfortable and suitable location.
From the experiments we should choose lamps with light distribution that is appropriate to the surface by a light that comes out has to be comfortable and appropriate to the place.
From the experiment we should choose lamp with light scattering with the appropriate room by the light out surface must be comfortable and appropriate place.