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Model # 422675

Internet # 203466573

Store SKU # 153386

4 ft. T12 40-Watt Cool White Supreme Alto Linear Fluorescent Light Bulb (10-Pack)

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

$19.97 /case
(limit 35 per order)




Model # 422675

Internet # 203466573

Store SKU # 153386

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: 21.9 years (based on 3 hours/day)
  • 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.) 
Product Length (in.) 
Actual Color Temperature (K) 
Average Life (hours) 
Bulb Shape 
Bulb Type 
Color Rendering Index 
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 
Start-Up Type 
Watt Equivalence 
Wattage (watts) 
Warranty / Certifications
ENERGY STAR Certified 
Manufacturer Warranty 
Yes, 7 Years. See "More Information tab" for details. 


Rated 4.4 out of 5 by 76 reviewers.
Rated 1.0 out of 5.0 by Dud of the Century People you better get ready for a great awakening. I have put in 1000+ of these bulbs in commercial operations. They work just fine for 6-8 months. This bears repeating because a lot of people have put these bulbs in and then 2 days later written about how great they are. Again, they work great for 6-8 months, then you will see that they are the worse bulb that you ever purchased. First they will act like they won't all come on. Maybe you have a room with 10 lights. You flip the switch once and you get 3 lights on. You flip the switch again and you get 5 lights on. You flip the switch again and half of those 5 go out and part of the remaining 5 come on. Do this about 7 times and maybe, if your lucky, you will get all 10 lights on. Can you imagine doing this somewhere that has 40 rooms? Not too good. Then, in another 3 months you can start changing out all of your ballasts, because these bulbs have slowly killed them. Now you get to upgrade to T8's or LED's. I suggest LED's. I think Philips put these bulbs out to silently kill all of the T12 ballasts right about the time that they outlaw this bulb and make it obsolete. I hope you "HAPPY" people are still happy a year from now. I started out happy. Now I'm LED'd. GOOD LUCK!!!!! August 31, 2015
Rated 4.0 out of 5.0 by Good alternative to Sylvania Worked OK in the ceiling light banks at the office. Just what we needed. Used to use Sylvania (are they still selling in the US?....) November 3, 2015
Rated 5.0 out of 5.0 by 4 ft flo4 ft. T12 40-Watt Cool White Supreme Alto Linear Fluorescent Light Bulb (10-Pack) These lights are used in my workbench area and last a very long time. They are also durable in this area of concentrated spray painting and misc. work. The price is also great. October 27, 2015
Rated 5.0 out of 5.0 by Good product Best to buy multi-pack for lower price. Puts out great light. October 27, 2015
Rated 5.0 out of 5.0 by Great Product Great Product. Works Very Well. Will order again.! October 20, 2015
Rated 5.0 out of 5.0 by Good so far Easy to install and worked perfectly. Great price for what you get. October 13, 2015
Rated 5.0 out of 5.0 by Good Purchase Purchased for use in my garage..Home Depot had the best pricing of all. September 29, 2015
Rated 5.0 out of 5.0 by Fluorenct light bulb order On time, easy to load and are exactly the light bulbs we use. September 27, 2015
  • 2015-11-26 T10:57:12.757-06:00
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