I have at times used the ceiling
bounce effect. Last instance was with
ETC S-4 Parcanss with 375w lamps in a classroom with a deep Rx27 red
gel. Very nice
effect, the cans almost took upon themselves their own flame pot
effect. Ceiling
bounce for lighting can be done and given the
throw length in combination with the
beam angle and
intensity, can be very useful for a good matt diffusion/dispersion of light. Good idea on your part for thinking it. Just a question of
throw range to the ceiling, than reflective light off it range to the audience in addition to reflective light off it, if or if not it's going to provide sufficient lighting to read the program. Kind of depends upon
throw distances for the most part and ceiling texture and color of course. At least in your concept the direct and overly intense light sources by way of glare factor is taken care of. The eye is drawn to the brightest light source, thus you won't have audience complaining about looking at parcans shining directly down at them. Good idea for providing light. Dust factor is a minor factor in my opinion, the lamp is going to get dust no matter if there is a
lens or not when pointed up. Just that the without
lens the
par should be a VNSP my
point. What MFL/WFL
lens works best is something for you to investigate. Sure a WFL might provide a larger dispersison of light, but the chief question is if that light once reflected is sufficient to light the old ladies in the audience wishing to read the program.
Hope to hear your results and details of the show design soon. All of our fingers are crossed.