559.6.1.5 Fixing of the luminaire
Adequate means to fix the luminaire shall be provided.
The fixing means may be mechanical accessories (e.g. hooks or screws), boxes or enclosures which are able to support luminaires or supporting devices for connecting a luminaire.
In places where the fixing means is intended to support a pendant luminaire. the fining means shall be capable of carrying a mass of not less than 5 kg.
I does continue where it weighs more, but 5 kg from plaster board seems a massive weight however well the weight is spread, can these devices really take 5 kg?