Philips 21-Watt 34 in. Linear T5 Fluorescent Tube Light Bulb, Cool White 4100K, ALTO – 40-Pack
Regular price $356.00Philips 21W 34" T5 Cool White Fluorescent Tube, ALTO (40-Pack)
Energy-saving Philips ALTO T5 fluorescent tubes deliver cool white 4100K light for offices and commercial spaces. At 34 inches and 21 watts, these lamps fit shorter T5 fixtures while offering long life and consistent lumen output.
Key Features:
- Cool White 4100K: Balanced, neutral light ideal for workspaces and retail
- Energy-Saving T5 Technology: Higher efficiency and better lumen maintenance than T12
- Long Service Life: Rated up to 25,000 hours to reduce maintenance
- Compact 34-inch Length: Fits shorter commercial T5 fixtures
- ALTO Low-Mercury Design: Environmentally conscious construction
Specifications Table:
| Specification | Details |
|---|---|
| Wattage | 21 Watts |
| Bulb Technology | Fluorescent |
| Bulb Shape | T5 |
| Length | 34 in |
| Nominal Length | 3 ft |
| Diameter | 0.625 in |
| Base Type | Miniature Bipin (G5) |
| Color Temperature | 4100K Cool White |
| CRI | 85 |
| Brightness | 2100 lumens |
| Average Rated Life | 25,000 hours |
| Contains Mercury | Yes (ALTO low-mercury) |
| Finish | Opaque |
| Model Number | F21T5/841/ALTO |
| Pack Quantity | 40 bulbs |
Frequently Asked Questions (FAQ):
Q: What base type do these bulbs use?
A: Miniature bi-pin (G5) base for T5 fixtures.
Q: Are these bulbs dimmable?
A: Most standard T5 fluorescent tubes require compatible dimming ballasts; check your fixture specifications.
Q: What is the light output?
A: Approximately 2100 lumens per bulb.
Q: Do these contain mercury?
A: Yes, as with all fluorescents; ALTO design uses reduced mercury content. Dispose/recycle per local regulations.
Q: What is the rated life?
A: Up to 25,000 hours under typical commercial use with compatible ballast.
Streamlined Cool White Clarity for Modern Workspaces
This slender T5 tube casts a crisp, cool-white glow that sharpens edges and enlivens architectural detail. I love the refined 34-inch silhouette—an elegant proportion for continuous runs in corridors and studios. Pair it with satin aluminum housings and matte surfaces to amplify its clean, contemporary vibe. It’s a quiet essential—functional luxury that elevates everyday light.
Choose this 40-pack of Philips ALTO T5 tubes to upgrade your fixtures with efficient, long-lasting cool white illumination.
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