Philips Lighting 458307 PL-T T...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.86
Philips Lighting 458307 PL-T Triple U-Tube CFL, 33W, 4-Pin GX24q-3, 3500K

Philips Lighting 458307 PL-T Triple U-Tube CFL, 33W, 4-Pin GX24q-3, 3500K

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Model: 458307

In Stock (leaves warehouse same day if ordered before 3pm ET)

$16.86
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Philips Lighting 458307 PL-T Triple U-Tube CFL, 33W, 4-Pin GX24q-3, 3500K

The Philips Lighting 458307 PL-T 32W/835/A/4P/ALTO is a dimmable PL-T triple U-tube linear compact fluorescent lamp built for commercial and light-industrial fixtures that require a compact, high-output light source. This 33-watt lamp uses a 4-pin GX24q-3 base for compatibility with dimming and programmed-start ballasts, and it delivers 2250 lumens at a 3500K color temperature with an 82 CRI rating for accurate, natural color rendering. As part of Philips' Alto® lamp family, this PL-T lamp is engineered to combine energy efficiency with consistent, reliable performance across its rated service life, making it a practical retrofit or new-installation choice for facilities managers and electrical contractors specifying compact fluorescent lighting.

Key Features

  • Lamp Type: PL-T triple U-tube linear compact fluorescent design for compact, high-lumen-density fixtures.
  • Light Output: 33-watt lamp delivering 2250 lumens for reliable general and task lighting applications.
  • Color Temperature: 3500K neutral white light with an 82 CRI for accurate color rendering in commercial spaces.
  • Base Configuration: 4-pin GX24q-3 base designed for use with dimming and programmed-start electronic ballasts.
  • Dimmable Operation: Compatible with dimming ballast systems for flexible lighting control in occupied spaces.
  • Alto® Technology: Part of the Philips Alto® lamp platform, engineered for efficient, dependable fluorescent lighting performance.

Technical Specifications

  • Wattage: 33W
  • Lumens: 2250
  • Color Temperature: 3500K
  • CRI: 82
  • Base: 4-Pin GX24q-3
  • Lamp Family: PL-T Triple U-Tube
  • Dimmable: Yes

Typical Applications

  • Commercial Office and Retail Lighting Fixtures
  • Dimmable Lighting Systems in Conference and Occupied Spaces
  • Compact Fluorescent Retrofit Projects
  • Facilities Requiring Neutral White, High-CRI Illumination
  • Light-Industrial and Institutional Lighting Applications

Why Philips Lighting?

Philips Lighting's PL-T Alto® series pairs efficient compact fluorescent technology with dimmable operation, giving electrical contractors and facility managers a dependable lamp for spaces that demand accurate color rendering and flexible light control. Backed by Philips' long-standing reputation in commercial lighting, the 458307 lamp is built to deliver consistent 3500K output and 82 CRI performance across its service life, supporting professional installations where reliability and lighting quality matter most.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
PHIL-20260925
Product Type:
Compact Fluorescent Lamp
Product Wattage:
33W
Light Temperature:
3500K
Bulb Base:
GX24q-3
CRI:
82
Lumens:
2250
Dimmable:
Yes
Department:
Electrical
Product Subgroup:
Lamps & Bulbs
Product Group:
Lighting
Color Designation:
White (WH)
Base:
GX24Q-3 [ GX24q-3]
Color Code:
835 [ CCT of 3500K]

Philips Lighting 458307 – Frequently Asked Questions

1) Can I dim the Philips 458307 33W PL-T lamp?
Yes, the lamp itself is dimmable, but the dimming comes from the ballast, not the lamp. The 458307's 4-pin GX24q-3 base is what makes dimming possible, since the cathodes are brought out separately for a dimming or programmed-start electronic ballast. On a standard instant-start or non-dimming ballast it will simply run at full output.
2) Is the GX24q-3 base interchangeable with GX24q-2 or GX24q-4 sockets?
No. The GX24q keying number changes with wattage, and the 458307 is GX24q-3. The notch pattern physically blocks a GX24q-3 lamp from seating in a GX24q-2 or GX24q-4 socket, so you have to match the q number on the lamp you pulled out, not just the GX24q family name.
3) What does the 835 color code on this Philips PL-T lamp mean for matching existing lamps in my building?
835 breaks down as 8x CRI and 35 hundred Kelvin: 82 CRI at 3500K neutral white. If the lamps already in your fixtures are marked 835, this will match them in appearance. Lamps marked 841 (4100K) or 830 (3000K) will read visibly cooler or warmer side by side, so avoid mixing color codes within the same room.
4) My old lamp is marked 32W but this one says 33W. Is it the right replacement?
The 458307 is catalogued as 33W and its lamp designation reads PL-T 32W/835/A/4P/ALTO. Both numbers refer to the same lamp, so a fixture lamped with a 32W PL-T 4-pin on a GX24q-3 socket takes this one. Match the base keying and the 835 color code and you are on the correct part.
5) What is the closest Sylvania equivalent to the Philips 458307 PL-T triple U-tube CFL?
The nearest Sylvania counterpart in triple-tube form is the Dulux T/E/IN Ecologic family, represented by the Sylvania 20877, an 18-watt 4-pin compact fluorescent at 3500K. It matches the Philips 458307 on 3500K color temperature and 4-pin operation, but the Philips lamp is a 33W unit producing 2250 lumens on a GX24q-3 base, so the two are not interchangeable on wattage or lumen output. Confirm the ballast and the lampholder pin spacing before swapping a 33W triple-tube for an 18W one.
6) If the fixture takes a twin-tube CFL rather than a triple U-tube, what should be used instead of the Philips 458307?
Use a twin-tube lamp such as the Sylvania 20586 Dulux L Ecologic, a 40W twin-tube CFL at 4100K. The Philips 458307 is a PL-T triple U-tube design at 33W and 3500K, and its folded triple-tube envelope will not seat in a lampholder built for a long twin-tube lamp. The Sylvania lamp also runs a cooler 4100K, so a mixed install will show a visible color difference against 3500K lamps.
7) How much light does the 33W Philips 458307 CFL put out?
2250 lumens at 33 watts, which works out to roughly 68 lumens per watt. That output level is typically used in recessed downlights, wall sconces and small troffers where a compact high-output source is needed in place of a longer linear tube.
8) What is the difference between a PL-T triple U-tube CFL and a twin-tube or double-tube lamp?
A PL-T triple U-tube folds the arc tube into three U bends, so it packs higher lumen output into a shorter overall envelope than a twin-tube of the same wattage. That matters in shallow downlight cans and compact housings. If your fixture is longer and narrower, a twin-tube style suits it better, for example the Sylvania Dulux L Ecologic twin-tube or the Sylvania Dulux Double Ecologic. For 4-pin triple-tube alternatives, Sylvania's Dulux T/E/IN series is the same lamp family type.
9) What is the closest cross-brand alternative to the Philips 458307 PL-T lamp?
Sylvania's Dulux T/E/IN Ecologic line is the equivalent 4-pin triple-tube family. The 20877 in that series is an 18-watt 3500K lamp, so it matches the 3500K color of the 458307 but not its 33W output, meaning it is not a drop-in on wattage or base keying. Treat the Dulux T/E/IN series as the right family to shop and match wattage and GX24q keying to your socket.
10) Do I need to change the ballast when relamping with the Philips 458307?
Not if the fixture already runs a 4-pin 32/33W PL-T lamp on a GX24q-3 socket, the existing electronic ballast stays. You only touch the ballast if you want dimming and the fixture has a non-dimming ballast, or if the sockets are 2-pin, in which case both socket and ballast have to be replaced.
11) Which lamp should be specified for a dimmed conference room, the Philips 458307 or a Sylvania Dulux?
The Philips 458307 is listed as dimmable and uses a 4-pin GX24q-3 base intended for dimming and programmed-start electronic ballasts, which is what a dimmed conference room needs. Among the Sylvania alternatives, the 20877 Dulux T/E/IN and the 20721 Dulux D/E Ecologic are 4-pin lamps, the pin count required for any dimming ballast circuit, but the Philips lamp is the one specified here with dimmable operation and an 82 CRI at 3500K for occupied commercial space.
12) For a facility standardizing on 3500K lamps, which of the compact fluorescent options match?
The Philips 458307 runs 3500K with an 82 CRI, and the Sylvania 20877 Dulux T/E/IN is also a 3500K lamp, so the two will visually match in adjacent fixtures even though the Philips unit is the 33W triple U-tube and the Sylvania is an 18-watt lamp. The Sylvania 20721 Dulux D/E is 3000K and the Sylvania 20586 Dulux L is 4100K, both of which will read warmer or cooler than a 3500K standard.
13) Is 82 CRI good enough for retail or office space?
At 82 CRI the lamp renders color well enough for general office, corridor and standard retail sales floor use, which is where PL-T triple-tube lamps are most often specified. For color-critical work such as paint matching, printing or apparel display, buyers usually spec a higher CRI source instead.
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Does the Philips Lighting 458307 come with a warranty?
Absolutely. The Philips Lighting 458307 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Philips Lighting 458307?
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