Can any1 point me in direction of lux calc program (Free)
Got x4 4ft 36w tubes per fitting and x9 fittings in room measuring 12m x 8m x 2.4m with 5x4mx2.4m area excluded for toilet.
Lux level needs to be 600
Is it acceptable to have an earth clamp on the steel of the SWA to 'Earth' The SWA? Seen it a few time now when people cant get it into a glanded metal box