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Six 18-inch 15-watt T8 fluorescent tubes in a case

OSRAM

OSRAM F15T8/GRO/AQ/RP 15W 18in T8 fluorescent lamp 325lm 7500h (case of 6)

SKU CH-QSFK-HP5Y8

Case of six 15 W T8 fluorescent tubes, 18 inches long, with GRO-LUX phosphor for plant growth and aquarium use

  • Power rating15
  • Product typeFluorescent Tubes
  • GRO-LUX phosphor drives photosynthesis for healthy plants
  • 325 lumens illuminate aquariums and terrariums with vivid colour
  • 15 watt T8 tube runs on standard preheat ballasts
  • 18 inch length fits common fixture sizes
  • 7500 hour rated life reduces replacement frequency

Purpose-built spectrum

This case contains six 15-watt T8 fluorescent tubes measuring 18 inches each. The GRO-LUX phosphor blend targets the red and blue wavelengths that drive photosynthesis in aquatic and terrestrial plants. Rated output is 325 lumens per lamp with a 7500-hour average life. Supplied as model 22511 in new condition.

Indoor growers and aquarists

Hobbyists lighting planted tanks, terrariums or seedling shelves will benefit from the spectrum tailored for chlorophyll absorption. The preheat design requires a compatible ballast and starter; installations running instant-start or rapid-start gear should look elsewhere. Not suited for general room illumination where high lumen density or cool white colour is preferred.

Phosphor and wattage

The defining spec is the GRO-LUX wide-spectrum phosphor combined with 15 watts at 325 lumens. This fixes both the spectral quality for photosynthesis and the electrical load per fixture. Verify that your ballast matches 15 W T8 preheat operation before purchase.

How it compares

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

Price $39.99
Pricier than about 65% of the 491 comparable items (median $28.99).

Specifications

Product
Brand nameSylvania
Product typeFluorescent Tubes
Power
Power rating15

Questions about this item

How much usable light does the 325-lumen output give in a planted aquarium?

The 325-lumen output provides a wide-spectrum red-and-blue emphasis that drives photosynthesis for plants that thrive in direct sunlight while enhancing fish and plant colours in an 18-inch tank.

What fixture does the T8 preheat design require?

The lamp uses a standard T8 bi-pin base and needs a preheat ballast or starter-equipped fixture rated for 15 watts.

Will the 18-inch length fit my hood?

The tube measures 18 inches end-to-end, so it fits any hood or strip light designed for an 18-inch T8 lamp.

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