Tension wire grids require periodic inspections. Lights shining through the tension grid light up a section of the grid itself, which some audience members find distracting. The cables of the grid absorb and redirect some of the light from a fixture, leading to a negligible loss in total light output. Working on a tension grid can take time to get used to because of the compliant nature of the surface. This motion coupled with the illusion of no floor can be disconcerting to some.
