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Model # 422709

Internet # 203466574

Store SKU # 151012

4 ft. T12 40-Watt Cool White Supreme Alto Linear Fluorescent Light Bulb (30 per Case)

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

$59.00 /case
(limit 35 per order)




Model # 422709

Internet # 203466574

Store SKU # 151012

Designed to help meet various general-purpose lighting needs around your home and office, the Philips 40-Watt 4 ft. T12 Linear Fluorescent Light Bulbs offer a cool white color with an output of 2600 Lumens. These bulbs feature ALTO technology for low mercury content.

  • Brightness: 2600 Lumens
  • Estimated yearly energy cost: 4.82 (based on 3 hours/day, 11¢/kWh. cost depend on rates and use)
  • Life: 24000 hours
  • Light appearance: 4100K (cool white)
  • Energy used: 40-Watt
  • Lumens per Watt: 65
  • For indoor, commercial and residential use
  • Ideal for general purpose applications including home and office
  • T12, Bi-Pin
  • Fluorescent lamp with alto technology has a reduced mercury content for an environmentally friendly alternative to standard bulbs
  • Contains mercury: yes (for more info on clean-up and safe disposal, visit:

Info & Guides

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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, 7 Years. See "More Information tab" for details. 


Rated 3.6 out of 5 by 12 reviewers.
Rated 5.0 out of 5.0 by Great bulk price, super bright I love buying the bundle pack to save money. This makes it just as ap as buying it at the big box stores. July 21, 2015
Rated 1.0 out of 5.0 by Bad service from Home Depot The bulbs look like they will be fine but we ordered a 30 pack and they were busted up when they got here. You contact Home Depot they tell you tough luck, contact Phillips the manufacturer and they will send a label to pick up the broken bulbs and then when they get them back they will replace them in about a month. This is really bad service. November 13, 2014
Rated 2.0 out of 5.0 by Will review replacement lighting as these are not bright enough for me. Unfortunately, I must return these bulbs as they are not bright enough for my art studio. The Philips bulbs I originally had in my studio, most of which are still working after 11 years, are F40T 12/DX Alto collection. Was unable to find these and could not find information indicating which are "bright, brighter and brightest" for those of us unfamiliar with lighting lingo. The nearest Home Depot is 40 miles away so will have to check another day. Was very pleased with the original ones and would like to replace this order with comparable lighting. What do you suggest? March 27, 2015
Rated 3.0 out of 5.0 by Philips4 ft. T12 40-Watt Cool White Supreme (4100K) ALTO Linear Fluorescent Light Bulb Not bright enough compared to the Alto 5,000K bulbs. Got these instead because the 5,000K were much more expensive at Home Depot.Should have purchased the 5,000K at a lighting store where they have them for the same price as Home Depot's Cool White bulbs, namely $60 for the case... May 12, 2015
Rated 5.0 out of 5.0 by 4FT T12 40-WATT COOL WHITE SUPREME (4100K) ALTO LINEAR FLOURESCENT LIGHT BULBS (30 PACK) The light bulbs where very energy efficient and not pricey. the quanity met the demand for superior lighting and gave those areas of that were upgraded the light it needed to bring out the renovation that was completed. Not to bright and not to dim. Thanks Home Depot for making it easy!!!!! February 17, 2015
Rated 4.0 out of 5.0 by Case of fluorescent light bulbs What can you say about fluorescent light bulbs except they all worked. February 25, 2015
Rated 1.0 out of 5.0 by Do not last I always purchase tubes by the case as I like to have the same color bulbs in my fixtures. I have several rooms in my house that have more than one 4 ft fixture in them. I loved the light that these bulbs put out, but now that I have had them just a little over a year they are starting to go out. I started replacing them when bulbs left in case and the bulbs when placed in fixtures do not want to come on when switch is first turned on. If you turn switch off and on several times they will light up. Not lasting a year in fixture I can get over as I use lights a lot, but having bulbs never used not work is poor quality. I can place different color bulbs warm white from different brand that I have had for years setting in garage and they come on when switch is turned on, so I know it is not fixtures. I want dependable product not quality like this. I guess you get what you pay for! September 22, 2014
Rated 5.0 out of 5.0 by Philips 4' Tubes are great! Philips lighting bulbs are a great value and they perform as stated. I would recommend the Philips brand of lighting to all. July 1, 2014
  • 2015-11-29 T11:18:55.159-06:00
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