Fluorescent Tubes

Match the tube length and diameter (T8, T12, etc.) and the tube's pin/base type (e.g., G13) to the fixture specifications; measure existing tubes or check the fixture label for compatible tube types and lengths

Compare lumen output for brightness and Kelvin rating for color temperature (2700K–6500K typical); higher lumens mean more light, and lower Kelvin is warmer while higher Kelvin is cooler/whiter

Yes — confirm whether your fixture uses a magnetic or electronic ballast and whether it requires instant-start or programmed-start tubes; some tubes are ballast-compatible while others need the ballast bypassed or replaced

Linear fluorescent tubes vary by type and ballast compatibility; typically newer T8 tubes with electronic ballasts are more efficient and offer longer rated lifespans than older T12 tubes, with lifespans often specified in hours on product specs

Fluorescent tubes contain small amounts of mercury and should be handled carefully to avoid breakage; follow local hazardous-waste recycling guidelines for disposal and use protective gloves and eye protection if a tube breaks

Mixing brands is generally safe if tubes have the same electrical specs and are compatible with the ballast, but avoid mixing color temperatures in the same fixture to prevent uneven light appearance

Fluorescent tube costs vary by type, length, and features; budget options can be under $25 while higher-performance or specialty tubes are more expensive; compare lumen output, color accuracy (CRI), and rated life to balance upfront cost and operating efficiency