We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four 24 inch fluorescent tubes in a pack

SYLVANIA

SYLVANIA 23509 F20T12/D/RP Daylight Full Spectrum 24 inch Fluorescent Tube 4 pack

SKU CH-VP52-H8D45

Four 24 inch fluorescent tubes deliver 20 watt, 1075 lumen daylight at 6500K full spectrum

  • Power rating20
  • Product typeFluorescent Tubes
  • Daylight 6500K colour temperature matches natural light
  • Full spectrum output covers the visible range
  • 1075 lumens from each 20 W tube
  • 24 inch T12 length fits standard fixtures
  • Pack of four tubes for multiple replacements

SYLVANIA 23509 4-Pack Fluorescent Tubes

These SYLVANIA 23509 tubes are 24 inch fluorescent lamps sold in a pack of four. Each tube operates at 20 watts and delivers a 6500K daylight full spectrum output. The T12 diameter fits compatible fixtures in garages, workshops or covered outdoor areas.

Suits buyers needing multiple 6500K T12 replacements

The four-pack suits anyone replacing several tubes at once in linear fixtures that accept a T12 lamp. Buyers who need a different colour temperature, a T8 or T5 diameter, or a single tube should look at something else.

6500K colour temperature defines the light quality

The 6500K rating produces a cool, daylight full spectrum appearance measured at 1075 lumens per tube. If the application requires a warmer or cooler white point, this specification makes the product unsuitable.

How it compares

Measured against everything we stock in Lighting Fixtures & Bulbs, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 68% of the 491 comparable items (median $28.99).

Specifications

Product
Brand nameSYLVANIA
Product typeFluorescent Tubes
Power
Power rating20

Questions about this item

How do I install the 24 inch F20T12/D/RP tubes in my existing fixture?

Switch off power, remove the old tubes by twisting gently, align the pins on each new 24 inch tube with the sockets, insert and twist until they seat firmly; the step often missed is ensuring both pins on each end are fully engaged before restoring power.

What maintenance or replacement will the 20 watt daylight tubes need over time?

Fluorescent tubes gradually lose brightness and the ends darken; replace all four when output falls below 1075 lumens per tube or flickering appears.

What limit appears first when the 6500K tubes run continuously for long periods?

Sustained operation causes phosphor ageing that reduces lumen output before the tube fails completely.

More in Lighting Fixtures & Bulbs

Similar items