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- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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Description
Philips 21-Watt 34 in. Linear T5 Fluorescent Tube Light Bulb Cool White (4100K) Alto (40-Pack)Philips linear fluorescent 21 Watt 34 in. T5 cool white light bulb (F21T5 841) is ideal for residential use in garages workshops, basements, as well as for commercial use in general, decorative and architectural lighting. It provides a cool white light. Brightness: 1950 lumens Estimated yearly energy cost: $2. 89 (based on 3 hrs day, 11c kWh. Costs depend on rates and use.) Life: 22. 8 years (based on 3 hrs day) Light appearance: 4100K (Cool White)
Philips linear fluorescent 21-Watt 34 in. T5 cool white light bulb (F21T5/841) is ideal for residential use in garages workshops, basements, as well as for commercial use in general, decorative and architectural lighting. It provides a cool white light.
- Brightness: 1950 lumens
- Estimated yearly energy cost: $2.89 (based on 3 hrs/day, 11c/kWh. Costs depend on rates and use.)
- Life: 22.8 years (based on 3 hrs/day)
- Light appearance: 4100K (Cool White)
- Energy used: 21 Watts
- Lumens per watt: 95.24
- Ideal for residential use in offices, as well as for commercial use in general, decorative and architectural lighting
- Great for general purpose lighting - creates a balanced and pleasant light
- Contains mercury: yes (for more on clean-up and safe disposal, visit: epa.gov/cfl)
- Contains mercury: yes (for more on ceal-up and save disposal visit: www.epa.gov)
Features
| Light Bulb Base Type | Bi-Pin |
| Actual Color Temperature (K) | 4100 |
| Indoor/Outdoor | Indoor |
| Returnable | 180-Day |
| Light Bulb Base Code | G5 |
| Color Rendering Index (CRI) | 85 |
| Average Life (hours) | 25000 |
| Lumens (Brightness) | 2000 |
| Bulb Type | General Purpose |
| Wattage (Watts) | 21 |
| Color Temperature | Cool White |
| Number of Bulbs Included | 40 |
| Light Bulb Features | No additional features |
| Light Bulb Shape Code | T5 |
| Lighting Technology | Fluorescent |
| Bulb Shape | Linear |
| Bulb Construction | Glass |
| Bulb Diameter (In.) | 0.625 |
| Product Length (in.) | 34 |
| Approximate Light Bulb Length | 3 ft. |
| Manufacturer Warranty | Yes. Please see the "more information" tab for details |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 448 reviews
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Product Reviews
★★★★★ 5
Already assembled!
Size: 8 Panel, Color: Natural
Came way sooner than the estimated delivery date and it looks awesome! Biggest plus is it came ALREADY ASSEMBLED! I was expecting self assembly but maybe that's on me for not reading the specifics. Hoping it's the right size for my new studio apartment. So far the look and functionality is 10/10
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 17, 2025
★★★★★ 5
buen producto
Size: 6 Panel, Color: Dark Coffee
Me encanta mi biombo , lo compre porque no me cabe las prendas de vesir que tengo en el colgadero y el closet no me es suficiente.Puse el colgadero detras del biombo y no se nota nada , me gusta mucho. Buen material y firme
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
★★★★★ 4
Nice product!
Size: 8 Panel, Color: Black
It looks great just like the picture and it's is good material. Could be a little more sturdy but overall I am pleased with the purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
★★★★★ 5
Light weight & Sturdy
Size: 6 Panel, Color: Dark Coffee
I am so pleased with them. My lanai gets morning sun and I am concerned about the UV rays fading the
fabric of my furniture No more having to cover each piece at night. The screens are great.
Thank YOU
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Reviewed in the United States on November 10, 2025
★★★★★ 5
Good
Size: 6 Panel, Color: Dark Coffee
Good, no complaints after several months of use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
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