Danny sent in his DIY Fiber optic star ceiling and started to document how it was made – “If you are thinking about installing a fiber optic sky ceiling you really need to plan for it, otherwise, you will have a difficult time making it look good. During construction I placed 4” conduit from where the light unit would be mounted to the front of the ceiling. You want the light unit to be as close as possible to minimize fiber length (for cost). The custom fiber optic illuminators from FOSI use a 39w PAR 30 Metal Halide bulb and a very quiet effects motor, so placing it behind the stage was possible. Some less expensive illuminators use Halogen bulbs which heat up, requiring loud fans. “ – Link.