Philips 4 ft. T5 28-Watt Cool White (4100K) Linear Fluorescent ALTO Light Bulb-409631 - The Home Depot


Model # 409631

Internet # 202504387

Store SKU # 688951

4 ft. T5 28-Watt Cool White (4100K) Linear Fluorescent ALTO Light Bulb

Philips 4 ft. T5 28-Watt Cool White (4100K) Linear Fluorescent ALTO Light Bulb

This item has been discontinued.
The Home Depot no longer carries this specific product.

$11.52 / each


Model # 409631

Internet # 202504387

Store SKU # 688951

The Philips 28-Watt 4 Ft. T5 Cool White Linear Fluorescent ALTO Light Bulb can last for up to 3 years, or 20,000 hours, and uses only 28 watts of energy. This medium base, bi-pin linear fluorescent bulb provides a cool, white light that works well in both commercial and residential applications.

  • Light output: 2,900 lumens
  • Energy used: 28 watts
  • Life hours: 20,000 hours
  • For interior use
  • T5 shape with a medium, bi-pin base
  • Provides a cool, white light that is ideal for the home or office
  • Contains mercury: yes (for more info on clean-up and safe disposal, visit:

Info & Guides

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Approximate Lightbulb Length  48  Bulb Diameter (In.)  0.625 
Average Life (hours)  20000  Bulb Shape  Linear 
Bulb Type  Household  Commercial / Residential  Commercial / Residential 
Indoor/Outdoor  Indoor  Light Bulb Base Code  Bi-Pin 
Light Bulb Base Type  Bi-Pin  Light Bulb Features  No additional features 
Light Bulb Shape Code  T5  Light Color  Cool White 
Light Output (lumens)  2900  Lighting Technology  Fluorescent 
Number in Package  Watt Equivalence 
Wattage (watts)  28 
Warranty / Certifications
ENERGY STAR Certified  No  Manufacturer Warranty  Yes, 18.3 years. Please see package for details. 


Rated 1.3 out of 5 by 9 reviewers.
Rated 1.0 out of 5.0 by 3X the price, 1/10 the life comparied to commom size floresents. I installed a new fixture 5 months ago with 2 electronic ballasts powering 3 of these tubes. one tube died after 3 months, the other two died after 5 months. These tubes lights may last 20,000 hrs as the manufacturer claims if installed in the old school iron ballast fixtures, I don't know. But I do know they suffer sudden infant death syndrome (SIDS) if installed into a fixture with electronic ballasts. That aside, they are still 3 to four times the price of any other size tube light. Very dissatisfied. June 23, 2013
Rated 1.0 out of 5.0 by t5 junk It's thru they give fantastic light for what they are but they die fast . This 4f bulbs are pure JUNK I purchase 6 fixture and in 18 months I replace all of them (12) and now again Im down to one bulb in each . Out of 6 fixture 2 of them have to be replaced . ***DON't waist your money get the T8 *** I wish I can replace mine for T8 December 19, 2014
Rated 1.0 out of 5.0 by Outstanding.... poor life. Three bulbs installed in a new fixture in a laundry room lasted less than a year with very little use. They failed to start intermittently which developed into a full consistent failure. For an eleven dollar bulb with a 20,000 hour rated life, this is appalling performance. The big box store with the gable logo has house brand bulbs for less than seven dollars. November 1, 2014
Rated 1.0 out of 5.0 by Did not last Long New home in laundry room. Light was wonderful while it lasted. This bulb lasted only 6 months. For the price very disappointed. June 11, 2013
Rated 1.0 out of 5.0 by 20,000 hours my foot Bought a new fixture less than a year ago. I didn't realize it required these small, over priced and hard to find bulbs. Two went bad already. August 9, 2013
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Store Exclusive. This item is available for purchase in select stores only.