Model # 423961

Internet #203466589

Store SKU #149296

Philips 40-Watt 4 ft. T12 Linear Fluorescent Light Bulb Natural Light Supreme (5000K) (10-Pack)
0046677423964

Philips

40-Watt 4 ft. T12 Linear Fluorescent Light Bulb Natural Light Supreme (5000K) (10-Pack)

  • Simulates natural full spectrum light, for any room in the house
  • Light appearance: 5000K (Natural Light)
  • Lasts up to 21.9 years (based on 3 hours/day)
Includes 10 bulbs  ($4.10  /bulb)
$40.97
/case
Buy 3 or more  $34.82  /case
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Simulates natural full spectrum light, for any room in the house
  • Light appearance: 5000K (Natural Light)
  • Lasts up to 21.9 years (based on 3 hours/day)
Brighten your home or business with these Philips 40-Watt 4 ft. T12 Natural Light Linear Fluorescent ALTO Light Bulbs. These indoor, bi-pin fluorescent bulbs are designed to fit your everyday, general-purpose lighting needs. They simulate natural full spectrum light, for any room in the house.
  • Brightness: 2500-lumens
  • Estimated yearly energy cost: $4.82 (Based on 3 hrs/day, 11c/kWh. cost depend on rates and use)
  • Lasts up to 21.9 years (based on 3 hours/day)
  • Light appearance: 5000K (Natural Light)
  • Energy used: 40 Watts
  • Lumens per watt: 62.5
  • T12 bulb shape, medium bi-pin base
  • Contains mercury: yes (for more info on cleanup and safe disposal, visit: epa.gov/cfl)
  • For indoor, commercial and residential use
  • Ideal for indoor general lighting purposes for commercial and residential use
  • Brighten up with the right light fixtures. Check out our Buying Guide for helpful tips.
  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Simulates natural full spectrum light, for any room in the house
  • Light appearance: 5000K (Natural Light)
  • Lasts up to 21.9 years (based on 3 hours/day)
Model #: 423961
Sku #: 149296
Internet #: 203466589

Brighten your home or business with these Philips 40-Watt 4 ft. T12 Natural Light Linear Fluorescent ALTO Light Bulbs. These indoor, bi-pin fluorescent bulbs are designed to fit your everyday, general-purpose lighting needs. They simulate natural full spectrum light, for any room in the house.

  • Brightness: 2500-lumens
  • Estimated yearly energy cost: $4.82 (Based on 3 hrs/day, 11c/kWh. cost depend on rates and use)
  • Lasts up to 21.9 years (based on 3 hours/day)
  • Light appearance: 5000K (Natural Light)
  • Energy used: 40 Watts
  • Lumens per watt: 62.5
  • T12 bulb shape, medium bi-pin base
  • Contains mercury: yes (for more info on cleanup and safe disposal, visit: epa.gov/cfl)
  • For indoor, commercial and residential use
  • Ideal for indoor general lighting purposes for commercial and residential use
  • Brighten up with the right light fixtures. Check out our Buying Guide for helpful tips.
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Specifications

Dimensions

Approximate Light Bulb Length
48
Bulb Diameter (In.)
1.5

Details

Actual Color Temperature (K)
5000
Average Life (hours)
24000
Bulb Construction
Glass
Bulb Shape
Tube
Bulb Type
Linear
Color Rendering Index (CRI)
85
Color Temperature
Daylight
Color Temperature
Natural Light
Commercial / Residential
Commercial / Residential
Indoor/Outdoor
Indoor
Light Bulb Base Code
Bi-Pin
Light Bulb Base Type
Bi-Pin
Light Bulb Features
No additional features
Light Bulb Shape Code
T12
Lighting Technology
Fluorescent
Lumens (Brightness)
2500
Number of Bulbs Included
10
Returnable
90-Day
Specialty Bulb Type
Linear
Wattage (Watts)
40

Warranty / Certifications

Manufacturer Warranty
Yes, 7 Years. See "More Information tab" for details.

Specifications

Dimensions

Approximate Light Bulb Length
48
Bulb Diameter (In.)
1.5

Details

Actual Color Temperature (K)
5000
Average Life (hours)
24000
Bulb Construction
Glass
Bulb Shape
Tube
Bulb Type
Linear
Color Rendering Index (CRI)
85
Color Temperature
Daylight
Color Temperature
Natural Light
Commercial / Residential
Commercial / Residential
Indoor/Outdoor
Indoor
Light Bulb Base Code
Bi-Pin
Light Bulb Base Type
Bi-Pin
Light Bulb Features
No additional features
Light Bulb Shape Code
T12
Lighting Technology
Fluorescent
Lumens (Brightness)
2500
Number of Bulbs Included
10
Returnable
90-Day
Specialty Bulb Type
Linear
Wattage (Watts)
40

Warranty / Certifications

Manufacturer Warranty
Yes, 7 Years. See "More Information tab" for details.

Questions & Answers

Hi, is this F40T12 Natural Light 40w? Does this light bulb have "Alto" printed on it?

Hi, is this F40T12 Natural Light 40w? Does this light bulb have "Alto" printed on it?
Asked by: bulb
Yes, this product is 40W and does have ALTO on the packaging.
Answered by: CommunityAnswer
Date published: 2018-11-06

What's the CRI of this bulb?

It's printed clearly on the box/packaging it comes in, but no photo of this Philips 5000K T12 bulb in it's packaging on this website.
Asked by: Eric
Yes, these used to be the best "looking" bulbs you could buy, with a CRI of 92 - and 5000K is not too "warm" - yellow - or "cool" - blue. However, for the last year or two when you get to the store you find Philips has changed their spec and this is now a 90 CRI bulb. Still way better for your kitchen or foyer or laundry room than a CRI 75 shop light, but 90 CRI bulbs are available at many more places than the 92 CRI bulbs were - and I haven't found any 92 CRI bulbs recently anywhere at any price.
Answered by: JoeBob
Date published: 2018-04-03

After replacing the light bulbs in my kitchen, three weeks later, they don't come on, they just f...

After replacing the light bulbs in my kitchen, three weeks later, they don't come on, they just flicker...
Asked by: mimi1950
Maybe the ballast don't work.
Answered by: Gus
Date published: 2018-09-04

read below

is this the Philips Fluorescent Light Bulb 40 watt - 48" - T12 - Medium Bi-Pin (G13) Base - 5,000K - Colortone 50 - Natural Sunshine
Asked by: doggster
Hello and thank you for your question. While this is not the same as the Colortone light bulb, it matches other specifications and has a high CRI of 87.
Answered by: Consumer Lighting Team
Date published: 2015-09-17
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Customer Reviews

40-Watt 4 ft. T12 Linear Fluorescent Light Bulb Natural Light Supreme (5000K) (10-Pack) is rated 4.5 out of 5 by 54.
Rated 5 out of 5 by from Real bright lights and look better than the old warm... Real bright lights and look better than the old warm tone bulbs. I can really see my project space now. Philips makes one more bulb that is brighter, but only seems to be sold in a 30 pack. If you have at least 14 bulbs the need replacing, buy the 30 pack for the savings.
Date published: 2018-11-06
Rated 5 out of 5 by from This product was as expected and worked fine... This product was as expected and worked fine
Date published: 2018-10-23
Rated 5 out of 5 by from I was amazed/pleased when they arrived at my home, with... I was amazed/pleased when they arrived at my home, with no breakage. I have used them before and have found that the 5000K color temperature is, by far, my preference.
Date published: 2018-10-09
Rated 5 out of 5 by from brighter then the last box i bought brighter then the last box i bought
Date published: 2018-09-26
Rated 5 out of 5 by from Very well-boxed pack of light tubes. Used 8 out of... Very well-boxed pack of light tubes. Used 8 out of 10 right out of the box, saving 2 for standby. No duds. Just be aware that 5000K can be pretty bright for a kitchen in the pre-dawn hours, especially without your first cup of coffee. Still, I prefer the higher K-value than the yellowish tubes that I replaced. Eventually, I'll replace with dimmable LED fixtures, but for now, this was a good value. Also make sure your ballasts are in good working order. Had to replace a bad ballast in a bathroom fixture that was fried. So maybe your flickering flouro's may not be due to old bulbs after all.
Date published: 2018-09-25
Rated 5 out of 5 by from Just replacement bulbs...no problems... Just replacement bulbs...no problems
Date published: 2018-09-18
Rated 4 out of 5 by from Good, purer light. Fried a couple, then switched the... Good, purer light. Fried a couple, then switched the switch to off.
Date published: 2018-09-18
Rated 5 out of 5 by from not as hard on your eyes... not as hard on your eyes
Date published: 2018-09-07
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