/ 'light1' 0 0 -87 0.50 / 0 0 87 regular tetrahedron 'light2' 82 10 18 0.90 / 82 0 -29 'light3' -35 71 29 0.70 / -41 71 -29 'light4' -41 -71 18 0.30 / -41 -71 -29 /