Small Edison Screw (SES) bulb used in some ceiling fans, line voltage pendants, track lighting, show lights, enlargers, modeling lamps, photoflood fixtures, and studio lighting. These are high powered and high output, mains powered 220v-240v lamps. (When installing a halogen bulb, make sure that you do not touch the glass part of the bulb with your bare skin - e.g. fingers, as the natural oils from your skin can considerably reduce the life of the bulb).
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