I am a ceramics teacher at a high school. I need to build a lighting outfit for shooting the student work only. I think I want a "hot" 3 light system two side and one top. I have a gray backdrop, 50mm macro lense/camera, polarizing filter, tripod, and shutter release. most of the student work is 8 - 12in tall. However I need to be able to shoot work that can reach 3-4 feet. I want soft soft light. What can I buy. $500-$600