Model # 409664

Internet #100613779

Store SKU #971754

Store SO SKU #971754

Philips 4 ft. T8 32-Watt Natural Light ALTO Linear Fluorescent Light Bulb (2-Pack)


4 ft. T8 32-Watt Natural Light ALTO Linear Fluorescent Light Bulb (2-Pack)

$994 /set
(limit 35 per order)
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Product Overview

Illuminate your home or business with bright, natural light using these Philips ALTO 32-Watt 4 ft. natural light Linear Fluorescent Light Bulbs (2-Pack) The bulbs produce 2,850 lumens of light and last for an average of 30,000 hours for extended use. The bulbs consume just 32 watts of energy and feature a T8 shape and bi-pin base.

  • Brightness: 2,850 lumens
  • Estimated year energy cost: $3.85 (Based on 3hrs/day, 11c/kwh. Costs depend on rates and use.)
  • Life: 27.4 years (Based on 3 hrs/day)
  • Light appearance: 5000K (natural light)
  • Energy used: 32 watts
  • Lumens per watt: 92.2
  • Contain less mercury than standard fluorescent bulbs.
  • For general use including indoor, commercial and residential use. Ideal for home or office for versatility
  • Bi-Pin
  • Contains mercury: yes (for more info on clean-up and safe disposal, visit:

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

What is the CRI number?

Asked by: Mini
Color index is 82 but these Philips lights are garbage due to failing way too quick. Look at another brand like GE
Answered by: knuckles
Date published: 2017-03-16

Can u use this for growing plants indoors

Asked by: therandomperson
I'm not sure if it gives off the right spectrum of light for optional growth. I guess it would depend on the kind of plants you want to grow. Some plants make use of any kind of light and others need true sunlight or specific grow light.
Answered by: Mjh1
Date published: 2017-05-02

I also want to know CRI before buying.

Asked by: dylanmitchell
Color index is 82, but wouldn't recommend these particular lights, fail way too soon
Answered by: knuckles
Date published: 2015-11-17
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Customer Reviews

4 ft. T8 32-Watt Natural Light ALTO Linear Fluorescent Light Bulb (2-Pack) is rated 3.9 out of 5 by 15.
Rated 5 out of 5 by from When we updated the old fixtures in our kitchen we chose natural light over conventional fluoresc... When we updated the old fixtures in our kitchen we chose natural light over conventional fluorescent. The light is easy on our eyes and makes the kitchen brighter then before.
Date published: 2017-05-02
Rated 3 out of 5 by from Ok Ok
Date published: 2017-03-14
Rated 5 out of 5 by from Very good for bedrooms or any other location in any house hold. i bought these for a shop light i bought for my bed room and they are very bright they light up the whole bedroom with one bulb i would recomend this to anyone who is looking for a bright light like these.
Date published: 2012-05-01
Rated 3 out of 5 by from Lumens Specifications Listed Incorrect This item only produces 2850 Lumens not 2950. Also the model number ending 664 refers to 6500K Daylight Deluxe Bulbs which are also 2850 lumens;. However they do have a 10 pack off 6500K Daylight Deluxe that specify 2950 lumens as LT85's. I've spent over 100 dollars to get bulbs that specifications listed are not met. Using spectrometer and digital light meters. Still I've managed to get close to what is needed for my project, but what a waste. In the end it would have only cost me around 40 dollars if the specifications listed were anywhere close to item specifications.
Date published: 2014-07-25
Rated 5 out of 5 by from SUPER BRIGHT Very bright. Love 'em. Glad i went with 2950 lumens. If you want brilliant white light, these are the ones.
Date published: 2012-02-14
Rated 5 out of 5 by from Bulbs and ballast must match FYI. T8 bulbs are not a drop in replacement for T12. When switching from T12 to T8 bulbs the ballast must also be switched out.
Date published: 2015-04-23
Rated 5 out of 5 by from Brilliant light Have four of these bulbs lighting my 21x23 garage, and before it was lite by three 13watt CFL's. So needless to say there's a HUGE difference now! Nice bright natural appearing light. And I'm no longer worried about loosing fingers when I do woodworking, and I can actually see when I'm working on our cars! Time will tell if they last as long as they're supposed to. Quite happy with this purchase, and would recommend to others!
Date published: 2013-12-18
Rated 1 out of 5 by from Stay clear of this brand The bulbs failed after less than 100 hours, not only the first time but the 2nd and 3rd time, yes, I was a sucker and replaced them over and over, thought it may have been the fixture, replaced the fixture and the bulbs failed again, I contacted Phillips to inquire about the problem, was told that I may be operating the light improperly, really, how does a person turn a light on or off improperly? Go with another brand if you want to see in the dark.
Date published: 2014-01-28
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