Model # 422816

Internet #203466582

Store SKU #147899

Philips 4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)
0046677422813

Philips

4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)

  • Cool white lighting
  • Saves energy
  • Good for work spaces and more
$6.97 /set
(limit 35 per order)

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Product Overview

Light your basement, garage or workshop with the Philips Linear Fluorescent 40-Watt T12 cool white light bulb. It makes cool white light that is ideal for a work-like environment. Philips Linear Fluorescent T12 light bulbs feature ALTO Lamp Technology.

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Customer Questions & Answers

8 Questions13 Answers

Customer Questions & Answers

4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)
4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)

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3 answers

is it dimable?

This question is from 4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)
Asked by
south windsor, CT
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November 11, 2013
i am doing a job and the costumer wants dimable fluorescent lights.
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Answers (3)

Asked by
Cambridge, Ohio
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Home Improvement Profile: DIYer
August 9, 2016
Answer: 
Not as far as I know.
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Asked by
Waldorf, MD, USA
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February 15, 2014
Answer: 
Not sure, but I believe regular fluorescent tubes are not dimmable. Certain CFLs are dimmable due to their special ballast.
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Asked by
Philips Lighting, North America HQ
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November 14, 2013
Answer: 
Hello James, thank you for your question. These bulbs are not dimmable. There are many dimmable compact fluorescent options that are offered by Philips on HomeDepot.com, though. If you provide more information on the applications that you would like to use these in, the Philips Lighting team can suggest alternatives for you.
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2 answers

Is there a noticeable difference in color between this bulb (2600 lumens) and an older version with output of 3200 lumens?

This question is from 4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)
Asked by
Brownsville Tx
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January 20, 2016
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Asked by
hollywood fl
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May 1, 2016
Answer: 
yes of course 3200 is 20% brighter
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January 22, 2016
Answer: 
For the older lamp, the CRI was 70 and current lamp is 89. From this perspective, the color will look better. The color temperature and color points will be relatively similar but due to the CRI difference, the two lamps will look differently. Finally, the lumen output of the current lamp is 2600 so this effect will have an impact on the overall look of the older lamp versus the new lamp.
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2 answers

Is this operable in colder temperatures?

This question is from 4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)
Asked by
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January 15, 2016
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Asked by
hollywood fl
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May 1, 2016
Answer: 
the colder the temperature.....the harder starting the bulb is.........maybe no light at all........
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January 18, 2016
Answer: 
Yes it can. However the light output will be low depending on the temperature.
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2 answers

How do I know if I need a T8 or T12, the old bulb doesn't say. It says F40 Universal DLX 40 Watt Cool White. I measured it and it is about 46 inches.

This question is from 4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack)
Asked by
Freehold NJ
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December 26, 2015
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Asked by
hollywood fl
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May 1, 2016
Answer: 
measure the distance between the pins............in the t12 the distance is notably wider than the t8
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December 28, 2015
Answer: 
HiT8orT12lost,
Look at your old bulb, T12's are the standard bulb used for many years in florescent fixtures. T8's are the newer style of bulb and are smaller in diameter than a T12.
Mike
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Customer Reviews

4 ft. T12 40-Watt Cool White Supreme Linear Fluorescent ALTO Light Bulb (2-Pack) is rated 3.4 out of 5 by 8.
Rated 5 out of 5 by from Phillips T12 40-Watt Cool Supreme Linear Fluorescent ALTO Light Bulbs I purchase the 2-Pack are s... Phillips T12 40-Watt Cool Supreme Linear Fluorescent ALTO Light Bulbs I purchase the 2-Pack are so easy to install, the soft white lighting is nice to stand under while doing laundry and makes it so easy to find everything I'm looking for in my basement.I love these bulbs, I never purchase any other brands. I have had this one now up 2 months after replacing the last one for over 2 years, exactly the same type..This product highly meets my expectations. As you can see in my submitted photo especially hanging in the dark places of my home like my basement, Jesus likes it up there too for me. Thanks for offering me the opportunity to share my feedback review!
Date published: 2016-12-08
Rated 1 out of 5 by from Inferior Quality Replaced the bulbs in my garage shop lights with these. First, they are nowhere near as bright as the GE bulbs I have been using. Second, they buzz. I tried switching the bulb with the GE bulb right next to it and the buzzing followed the Philips bulb so it isn't my fixture. Third, as far as having a 24,000 hour life - ridiculous. These bulbs last 6 months or so, and that's turning them on for only a minute or two most days. Occasionally, the lights will be on longer if I'm working in the garage. I'll never buy these bulbs again. Most of the good reviews that are posted here are not from people who have used these bulbs for a few months. I'm going back to GE.
Date published: 2016-03-19
Rated 5 out of 5 by from Excellent replacement for Sylvania I replaced four Sylvania 34W tubes with these ones in my kitchen. At 40W the kitchen is now much, much brighter. The tubes were easy to install. Just swapped out the old ones and inserted the new ones. Just be careful about the diameter of the tubes you're looking for. The T12 tubes have a larger diameter than the T8 tubes I think, which therefore makes replacing T8's with T12's a bad idea. The length says 4 feet, but that's an approximation. The tubes are actually slightly shorter than 48 inches, but they did fit perfectly.
Date published: 2016-10-11
Rated 1 out of 5 by from I was disappointed that when I got the two bulbs home one did not work. Before that I went out a... I was disappointed that when I got the two bulbs home one did not work. Before that I went out a bought another light fixture thinking the ballast was bad on the old fixture when in fact the new bulb was bad. Be carful when buying these bulbs.
Date published: 2016-12-06
Rated 4 out of 5 by from Nice light. I really like the color of the light these give. It brightens our kitchen and makes everything look better.
Date published: 2016-08-09
Rated 1 out of 5 by from don't buy this bulbs I brought 4 bulbs only one of them is working don't buy this company bulbs
Date published: 2016-12-13
Rated 5 out of 5 by from Good product, good price Cool white is suitable for kitchen. Bought 4 to replace the ones that are old and worn out in the light fixture. The "Alto" line claims to contain less mercury than other products. Please be sure to recycle the old tubes, and Home Depot takes them.
Date published: 2014-02-16
Rated 5 out of 5 by from very good product Basic, inexpensive, old style product. Works great.
Date published: 2014-10-14
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