Which type of lamp holders can be used for more than 300 watt lamps only ?

Edison screw type lamp holders

Goliath Edison screw type holder

Swivel lamp holder

Bayonet cap lamp holder

Two way switch

Intermediate switch

Two plate ceiling rose

Three plate ceiling rose

Ceiling rose

Batten holder

Bracket holder

3 pin plug

Two way switch

Ceiling rose

Intermediate switch

Batten holder

Kit-kat fuse

Ceiling rose

Intermediate switch

Socket