ok heere is the frame to hold the lights i designed

[attachment=o118247]

i will be made of wood i am using 3/8 thick pices.
i lights used are the ones in the photo above not the 4 bulb one shown.

i am still trying to perfect the reflecter. i will be using cardboard with emergengy blanket glued th the board for reflection. also the wood froam will be wraped in reflective tape before lights and hood are installed.

2 2 questions
1) what shape should my reflecter be
a) straight angle wilth a flat top
b) straight angle roof type
c) an arch or half round type.

2) are the materials i am using ok. i read that plain untreated wood or treated wood can cause problems. and i am kinda worried that cardboard will cause a fire hazard.

any help greatly aperciated