SKU: 28728389774

Philips 28-Watt 4 ft. T5 Linear Fluorescent ALTO Tube Light Bulb, Cool White (F28T5/841)

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Description

Philips 28-Watt 4 ft. T5 Linear Fluorescent ALTO Tube Light Bulb, Cool White (F28T5/841)Philips 28W T5 4 ft Cool White Fluorescent Tube This Philips ALTO T5 fluorescent tube delivers bright, cool white 4100K light for residential or commercial fixtures while using just 28 watts. Rated for up to 20,000 hours, it provides 2900 lumens with a frosted glass finish and miniature bi pin base for reliable, efficient general lighting. Key Features: Long Life Efficiency: Up to 20,000 hour lifespan reduces replacement frequency and maintenance

Philips 28W T5 4-ft Cool White Fluorescent Tube

This Philips ALTO T5 fluorescent tube delivers bright, cool white 4100K light for residential or commercial fixtures while using just 28 watts. Rated for up to 20,000 hours, it provides 2900 lumens with a frosted glass finish and miniature bi-pin base for reliable, efficient general lighting.


Key Features:

  • Long Life Efficiency: Up to 20,000-hour lifespan reduces replacement frequency and maintenance
  • Bright, Cool White Output: 4100K color temperature with 2900 lumens for crisp task lighting
  • Energy Use: Consumes only 28 watts; approximately $3.38 yearly energy cost (3 hrs/day, 11¢/kWh)
  • T5 Mini Bi-Pin Fit: Linear T5 form with G13/miniature bi-pin base for compatible fixtures
  • ALTO Low Mercury Design: Fluorescent technology with frosted glass and damp-rated performance

Specifications Table:

Specification Details
Wattage 28 W
Bulb Type T5 Linear Fluorescent
Base Type Miniature bi-pin (G13/Medium Bi-Pin noted)
Length 46 in
Diameter 0.625 in
Color Temperature Cool White ~4100K
Brightness 2900 lumens
Average Life 20,000 hours (approx. 18.2 years at 3 hrs/day)
CRI 85
Finish Frosted
Material Glass
Dimmable No
Indoor/Outdoor Indoor; Damp Rated
Ballast Compatibility Type A
Voltage 120 V
Max Operating Temperature 113°F
Number of Bulbs Included 1
Lighting Technology Fluorescent
Model Number F28T5/841/ALTO
Estimated Yearly Energy Cost $3.38 (3 hrs/day, 11¢/kWh)
Lumens per Watt 103.6
Contains Mercury Yes

Frequently Asked Questions (FAQ):

Q: Is this bulb dimmable?
A: No. It is non-dimmable and should be used with standard switching controls.


Q: What base does it use?
A: A miniature bi-pin T5 base (G13/medium bi-pin listed by retailer). Ensure your fixture supports T5 linear tubes.


Q: What is the light color?
A: Cool White at approximately 4100K (listed as Cool White 4000K).


Q: How long does it last?
A: Rated up to 20,000 hours (about 18.2 years at 3 hours per day).


Q: Where can it be used?
A: For indoor use in residential or commercial fixtures; damp rated.


Crisp, Architectural Light in a Sleek T5 Profile

This linear T5 casts a cool, crystalline glow that sharpens edges and elevates everyday spaces. I love its slender silhouette and frosted finish—clean, modern, and quietly sophisticated. Line a workspace, laundry, or gallery wall where clarity and color accuracy matter, pairing it with matte metals and pale woods. It’s an effortless essential for polished, luminous living.


Brighten your space with long-lasting, cool white clarity—add the Philips 28W T5 ALTO tube to your cart today.

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SKU: 28728389774

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4.7 ★★★★★
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Constant Reader
Boise, US
★★★★★ 3
Bit of a snore
Format: Kindle
Mordecai Tremaine is a retired tobacconist and an amateur detective. He is invited to spend Christmas with an acquaintance in a country manor house who specifically tempts Mordecai Tremaine by hinting at a threat. This story has a period feel to it with servants, snow, secrets, and murder. The pacing is laborious. I hoped that the pace would improve when a murdered person in a Father Christmas suit is found on the floor in front of the Christmas tree. Alas, it was not to be. The character list is very long, and the characters are not well developed. This is the first book in a series featuring Mordecai Tremaine (who is only referred to by last and first names). I have a soft spot for British mysteries, including period British mysteries like those by Ngaio Marsh. While the mystery has its twists and turns as Mordecai Tremaine investigates to assist the police, it never quite clicked for me. I am not likely to read any of the other books in the series.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 6, 2018
G
Verified Purchase
Grandma
Los Angeles, US
★★★★★ 5
Enjoyable Classic mystery
Format: Kindle
I am an avid fan of vintage mysteries, and “English country house” mysteries are among my very favorites in that genre. I enjoyed this one very much and was pleased to see that there were two others available and a couple more being published. This book was my idea of a terrific cozy type mystery, and I enjoyed it very much. The Christmas setting added to its appeal. Mordecai Tremayne, the detective in this story is just eccentric enough to be interesting without being stereotyped. He observes people, and makes deductions based on these observations, along with his knowledge of human nature. In retrospect, he is almost a bit like male version of Miss Marple, although this did not strike me as a I read the book. This was a fun book to while away a few hours, and I look forward to reading others in this series. Highly recommended for fans of vintage mysteries, and cozies.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 17, 2018
S
Verified Purchase
smithirowa
New York, US
★★★★★ 4
Leaves You Wanting More
I read about this novel right after Christmas, but I decided to order it anyway. It was not supposed to arrive until some time in February, so I was pleasantly surprised when I received it within a few days of my order. With the snow finally falling in the Chicago area, I knew this would be a good time to read this book. The book begins with a summary of the case with somewhat overwrought language. However, as it moves on to the characters, it becomes more successful. It is important to remember that the novel was written in the 1940s, which means that we have a world that is slower paced than the 21st century. Of course we are looking at a wealthier segment of society in rural England, but this pace allows us to study the scenery and the characters more carefully. This is a world with a mansion that can house a number of guests for Christmas with these guests being able to stay over a few days with a pleasant host. The characters are mostly forgettable with the major exception of Mordecai Tremaine as the amateur detective who helps solve the case. He is a character who is unforgettable. The ending is well plotted, and it leaves the taste of a delicious Christmas dinner in the mouth of the reader. The author, Francis Duncan, wrote in the 1930s and 1940s, and this is the first book of his to be republished. I can only hope that other books by this author will be republished as well and republished soon or at least in time for me to read them by next Christmas. Without knowing anything about his other books, it would be nice to think that I could have other seasonal stories waiting for me in the future. The ending still remains in my mind, even several weeks after I have read the book. It would be delicious to meet Mordecai Tremaine again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2016
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Izybella
Waukegan, US
★★★★★ 5
I read it and LOVE it!!
Format: Paperback
I actually read this book for December 2021 and it was the perfect murder mystery book that takes place during the wintertime! If you like the style of writing from Sherlock Holmes or Agatha Christie then you will love this book! Also, you don't have to worry about reading certain books before this one because the series has its own separate story for each book! I loved the story so much that I immediate order another book from the series!!
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Reviewed in the United States on December 26, 2021
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Verified Purchase
Carol Mello
Dallas, US
★★★★★ 3
Not as good as "Murder has a motive"
Format: Kindle
Actually, if one looks at the original copyrights of this book and "Murder has a motive" , it is clear this is the second book, not the first. In addition, the notoriety Mordecai Tremaine gained from the Dalmering case is mentioned in the text of this book. This book moves much more slowly than " Murder has a motive" and the secrets of the suspects are harder to figure out. I did notice the murderer's slip up during the murder discovery scene. The book ends abruptly and another character who is a psychopath apparently is going to get away without punishment of his despicable behavior that has been going on for a very long time. The plot is original in nature which is a plus. Because of the plot slowness (I trudged onward to the end) and the lack of justice for the psychopathic character, I had to remove a star for each.
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Reviewed in the United States on March 23, 2021

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