Spiral CFLs are energy-efficient bulbs with a spiral shape that provide bright, consistent light while saving energy. They come in various base types to fit different fixtures, from homes to commercial spaces. 

Candelabra Base (E12) 

A small 12mm screw-in base, ideal for decorative fixtures like chandeliers or sconces. Perfect for compact spaces needing efficient lighting. 

GU24 Base 

A twist-and-lock 2-pin base found in modern fixtures. Easy to install and commonly used in lamps and ceiling lights. 

Medium Base (E26) 

The standard screw-in base for most household bulbs. Versatile for table lamps, floor lamps, and overhead fixtures. 

Mogul Base (E39) 

A large 39mm screw-in base for high-wattage industrial or commercial fixtures like warehouses and retail spaces. 

4-Pin Base 

Found in plug-in CFLs for fixtures with separate ballasts, used in recessed or commercial lighting setups.