A safety lampholder for a bayonnet bulb comprises a hollow housing defining slots at one end thereof to receive bayonet pins of an inserted bulb. Bulb engaging contacts are located within the housing for electrical connection to a power source to supply electricity to an inserted bulb. Apertured shutter means are also located within the housing for selectively obstructing access to the contacts and arranged such that insertion of a bulb actuates relative movement of the contacts and shutter means between a first inoperative position in which the contacts are obstructed by the shutter means and a second operative position in which the contacts extend through the apertures in the shutter means to bear against an inserted bulb. This may be effected by driving rotation of the contacts or the shutter means. Interengageable surface formations are provided within the housing for actuating displacement of the contacts and arranged such that, upon rotation of an inserted bulb, the contacts are displaced inwardly of the housing and raised from their first position and lowered through apertures in the shutter means into their second position, and upon removal of a bulb the contacts are raised back through the apertures in the shutter means and lowered into their first position.
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