G'day Nigel,

Gaffer tape is named for the Chief Lighting Electrician lof a film crew (his offsider is "Best Boy"!) ... but is sure isn't duct tape!

Gaffer tape will hang a kilowatt movie light off a rough cast wall ... and it doesn't have a dark side - it is creamy adhesive one side and metallic silver the other ... and costs about 10 times as much (from Lowell Lighting Systems).

Regards,

Bob Bolton