Spiral

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Spiral CFLs — also known as twister or corkscrew bulbs — are the most recognizable compact fluorescent lamp format. The helical tube design packs a long fluorescent tube into a compact shape that fits standard E26 medium base sockets, making these lamps a direct plug-in replacement for incandescent bulbs.

Spiral CFLs are widely used in table lamps, ceiling fixtures, closets, and general-purpose residential and commercial lighting. Available in a broad range of wattage equivalents (from 40W to 150W incandescent replacement) and color temperatures. Their proven energy savings and long service life have made them a staple of efficient lighting.

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