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Philips 15 Watt, 18 Inch T8 Plant Grow Fluorescent Bulb

SKU: 392266 | Ordering Code: F15T8/PLANT/18

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Lighting Facts Per Bulb

Brightness 410 lumens
Estimated Yearly Energy Cost $1.81
Based on 3 hrs/day, 11¢/kWh
Cost depends on rates and use
Based on 3 hrs/day6.8 years
Light Appearance
2700 K
Energy Used15 watts

Philips 15 Watt T8 Plant Grow fluorescent lamp. 

  • Lamp contains phosphors to produce colors of light that encourage plant growth

  • Perfect for indoor and greenhouse gardening


Full Specs

Product Details


Philips Lighting

Energy Used

A rating, expressed in watts, to indicate the rate at which a lamp consumes energy. Also known as wattage value.
Energy Used
15 Watts


The end (or ends) of the lamp that fits into the socket.
Medium Bipin

Bulb Shape

The description of the general appearance of a lamp/bulb consists of a letter(s) followed by a number. The letter indicates the shape of the bulb and the number relates to the diameter of the bulb in eighths of an inch. For example, a common household bulb is the A-19. The bulb is "A" shape and the diameter would be nineteen 8ths of an inch, or 2 3/8".
Bulb Shape

Bulb Color

The color of the light produced by a bulb
Bulb Color

Color Temperature (Kelvin)

An expression of the hue of the light emitted, measured in degrees Kelvin. Usually expressed by a four digit number followed by (k), such as 2700k. Higher temperatures indicate whiter, "cooler" colors, while lower temperatures indicate yellower, "warmer" colors. Some common Kelvin temperature benchmarks are 2700k (warm white), 3500k (neutral white), 4100k (cool white), 5000k (bright white), and 6500k (daylight).
Color Temperature (Kelvin)

Brightness (Lumens)

A rating of the inital light output of a bulb, rated after 100 hrs of operation. Lumens are a measure of how much light falls on one square foot of area, one foot away from the light source.
Brightness (Lumens)

Bulb Finish

The surface finish of a bulb, which may affect the quality of the light emitted.
Bulb Finish

Bulb Technology

The technology implemented by the bulb, e.g. incandescent, halogen, LED
Bulb Technology

Average Rated Life (hr)

A measurement of the average length of time, between first use and the point when 50% of the lamps tested have stopped functioning, , using an operating cycle of 3 hours on, 20 minutes off.
Average Rated Life (hr)

Length (in)

Also referred to as "Maximum Overall Length" (MOL). For light bulbs, it measures the length of a light bulb, from the top of the bulb to the bottom of the base or pins and is typically expressed in inches. For light fixtures and ballasts, it applies to the total horizontal length of the item.
Length (in)

Diameter (in)

Light bulbs: a measurement of a bulb's width taken at the widest point of the bulb. Fixtures: the measurement across the widest point of a circular fixture.
Diameter (in)

Contains Mercury (Hg)

Contains some level of the element Mercury. Typically, bulbs containing Mercury display the symbol 'Hg'.
Contains Mercury (Hg)


A General Electric brand-specific product number for an equivalent item and is provided for the purpose of cross-referencing.
49892 - F15T8/PL/AQ

Osram Sylvania

An Osram Sylvania brand-specific product number for an equivalent item and is provided for the purpose of cross-referencing.
Osram Sylvania
21657 - F15T8/GRO/AQ/RP


by PowerReviews
Philips15 Watt, 18 Inch T8 Plant Grow Fluorescent Bulb

(based on 1 review)

Reviewed by 1 customer

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Plant grow lights

By Diann

From Minnetonka, Minnesota

Verified Buyer


  • Bright


    Best Uses

      Comments about Philips 15 Watt, 18 Inch T8 Plant Grow Fluorescent Bulb:

      We are growing hot pepper plants and want to winter them over, so they're inside under the grow light and hopefully next growing season we'll have double the crop of this year.

      • Primary use:
      • Personal

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      Q & A

      Do you have questions about this product?

      Get answers from real customers and in-house experts with AnswerBox.

      1 Question | 1 Answer
      Displaying question 1
      • Q:

        Will this gro light bulb work in a fixture with a starter?
        Asked on 2/3/2013 by dekleb from Oak Harbor, OH

        1 answer

        • Bulbs.com LS1 Certified Lighting Specialist


          This is a linear fluorescent and requires a ballast to operate.

          Answered on 2/5/2013 by Anonymous
      Displaying question 1

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