These lights come in tungsten, HMI and LED. They are used for lighting large areas of your sets. I use them for creating day ambience outside of sets on stage. They hang just down from the ceiling and create a very large source when grouped together. I have used them to light green and blue screen environments.. I use them to light white cyc’s evenly. They project the light down and out the sides of a silk skirt that dangles down 2 to 3 foot from the source.