a box lined w/ thin insulation board is a good idea. if the light were to suddenly explode into flames would it be able to withstand...probably not. Fire hits card board and its all over... , I'd rather use a plastic bin..., just deosnt look safe.
I know a bulb deosnt suddenly burst into flames but i would like to think i'd be safe if it ever happened. I smoke weed and im paranoid, sry.
That straw idea is great, i would try it even though the plants look like there stretched beyond repair. - I bet they fell over by now anyways.....