Free Shipping and BOPIS


Model # 409631

Internet # 202504387

Store SKU # 688951

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

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Approximate Lightbulb Length 
Bulb Diameter (In.) 
Average Life (hours) 
Bulb Shape 
Bulb Type 
Commercial / Residential 
Commercial / Residential 
Light Bulb Base Code 
Light Bulb Base Type 
Light Bulb Features 
No additional features 
Light Bulb Shape Code 
Light Color 
Cool White 
Light Output (lumens) 
Lighting Technology 
Number in Package 
Watt Equivalence 
Wattage (watts) 
Warranty / Certifications
ENERGY STAR Certified 
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 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
Rated 1.0 out of 5.0 by 28 w 4ft t5 alto fluorescent bulb I wish I had read these reviews before I bought mine. What a piece of junk! Bulbs burned out 3 times this year. Cost me $70 first of year. Home Depot replaced free but I feel I'm wasting my time. The lumens are great but not worth the money and aggravation. Don't know what I'll get next, but not T5s!! December 10, 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 Product life expectancy extremely over-rated Professionally installed (2) fixtures containing 3 tubes each in June 2013. 4 of the 6 tubes have burned out in less than 100 hours of use. November 18, 2013
Rated 1.0 out of 5.0 by 6 Months is "Long Life"? I purchased a fixture in October 2012 that took 3 of these bulbs. All 3 burned out together last week. At the price they get for these, if the exorbitant cost replacement bulbs I got perform like the originals, I'll be shipping them and the fixture to DoE with a poignant suggestion what to do with them. Fortunately, there are still some dependable fixtures still available. March 31, 2013
  • 2015-10-08T09:13:42.334-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_9, tr_9
  • loc_en_US, sid_202504387, prod, sort_default
2 >>