Philips Lighting MasterClass I...
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Philips Lighting MasterClass InstantFit Dimmable LED Lamp, 5000K Daylight

Philips Lighting MasterClass InstantFit Dimmable LED Lamp, 5000K Daylight

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Model: 550442

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

$6.53
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Philips Lighting MasterClass InstantFit Dimmable LED Lamp, 5000K Daylight

The Philips Lighting MasterClass InstantFit Dimmable LED Lamp is a family of energy-efficient replacement lamps designed to upgrade traditional lighting with modern LED performance. This lamp line is available in two lamp shape/base configurations — an A19 Bulb with E26 Medium Screw base and a T8 Linear Tube with G13 Double-Ended base — so facility managers and electrical professionals can select the format that matches their existing fixtures. Across the family, these lamps deliver dimmable operation, 5000K Daylight color temperature, and 80 CRI color accuracy for crisp, true-to-life illumination in commercial, industrial, and institutional spaces. The T8 configuration is engineered as a direct InstantFit replacement for fluorescent tubes, using a 2-Pin G13 medium double-ended base for standard T8 fixture compatibility, while the A19 configuration uses a widely compatible E26 medium screw base for standard sockets. Both options are part of the Philips MasterClass InstantFit series, built to simplify retrofit projects and reduce energy consumption without requiring complex rewiring in compatible applications.

Key Features

  • Lamp Shape / Base Options: Choose from A19 Bulb - E26 Medium Screw base or T8 Linear Tube - G13 Double-Ended base to match your existing fixture type.
  • Dimmable Operation: Dimmable design allows flexible lighting control and ambiance adjustment where compatible dimming controls are installed.
  • Color Temperature: 5000K Daylight color temperature provides a crisp, energizing white light ideal for offices, retail, and workspaces.
  • Color Rendering: 80 CRI ensures accurate, true-to-life color rendering for everyday visual tasks.
  • InstantFit Installation (T8): MasterClass InstantFit technology is designed for straightforward installation into existing fluorescent fixtures without ballast replacement in compatible applications.
  • Standard Base Compatibility (A19): E26 medium screw base fits standard sockets for simple, drop-in replacement.
  • Energy Efficiency: LED technology delivers significant energy savings compared to traditional incandescent and fluorescent lamps of similar output.

Technical Specifications

  • Series: MasterClass InstantFit
  • Lamp Shape / Base Type: A19 Bulb - E26 Medium Screw or T8 Linear Tube - G13 Double-Ended
  • Color Temperature: 5000K Daylight
  • CRI: 80 CRI
  • Dimming: Dimmable
  • T8 Configuration Wattage: 8.9-Watt
  • T8 Configuration Lumens: 1600-Lumens

Typical Applications

  • Commercial Office and Workspace Lighting
  • Retail and Display Lighting
  • Fluorescent Fixture and Standard Socket Retrofits
  • Industrial and Warehouse Lighting
  • Educational and Institutional Facilities

Why Philips Lighting?

Philips Lighting's MasterClass InstantFit series combines energy-efficient LED technology with straightforward retrofit design, helping facility managers and electrical professionals reduce energy consumption across a range of fixture types. With dimmable operation, 5000K daylight output, and 80 CRI color accuracy shared across both the A19 and T8 configurations, this lamp family delivers dependable, consistent performance for demanding commercial lighting environments.

Product Specs

Product Type:
LED Lamp
Product Wattage:
8.9W
Lumens:
1600
Light Temperature:
5000K
CRI:
80
Bulb Base:
G13
Dimmable:
Yes
Department:
Electrical
Product Subgroup:
Lamps & Bulbs
list_batch:
PHIL-20260925
Series:
MasterClass InstantFit
Product Group:
Lighting
Product Finish:
Frosted
Country Of Origin:
United States

Philips Lighting 550442 – Frequently Asked Questions

1) Will the Philips MasterClass InstantFit T8 LED tube work in my existing fluorescent fixture without changing the ballast?
The T8 InstantFit tube uses a G13 medium bi-pin double-ended base and is built to drop into existing T8 fluorescent fixtures without a ballast swap or rewiring in compatible applications. The qualifier matters: InstantFit lamps run off the existing ballast, so the fixture's ballast has to be one the lamp supports. If the ballast is failed or incompatible, you are into a ballast-bypass tube instead, not this one.
2) If I want to stay on fluorescent T8 tubes instead of switching to LED, what should I order?
Two fluorescent T8 options cover that: the Sylvania 22438 Octron Vivid Value T8 fluorescent lamp and the Sylvania Octron 800 Ecologic T8 fluorescent lamp series. Both are fluorescent tubes and run on the fixture's existing fluorescent ballast. The Philips MasterClass InstantFit T8 is an LED tube on a G13 double-ended base and is dimmable, which fluorescent T8s are not without dedicated dimming ballasts.
3) I need a warm white A19 LED instead of daylight - what is the alternative?
The Sylvania 79292 A19 Contractor Series LED lamp is a 14-watt A19 at 2700K warm white, which suits residential-feel corridors, lobbies, and hospitality rooms. The Philips MasterClass InstantFit A19 is 5000K daylight with 80 CRI, a crisper white more typical of offices and work areas. Pick by the color temperature already installed on the floor so the fleet matches.
4) Is 5000K too cool for an office, or should I be looking at a warmer LED lamp?
5000K is daylight white, crisp and high contrast, which is why it gets specified for offices, workspaces, retail display, warehouses and schools. If you want a warmer, more residential look instead, the Sylvania 79292 A19 Contractor Series LED lamp runs 2700K warm white, and the Topaz LP16630K PAR16 is 3000K. Mixing color temperatures in the same room reads badly, so pick one and standardize the space.
5) Can I dim the Philips MasterClass InstantFit LED lamp on my existing dimmer?
Both the A19 and T8 versions are dimmable, but only where a compatible dimming control is installed. For the T8 that means the dimming system has to suit the lamp and the ballast feeding it; for the A19, an LED-rated dimmer. Older incandescent-only rotary dimmers often flicker or buzz with LED loads, so the dimmer is the part to verify, not the lamp.
6) How much light does the 8.9W T8 InstantFit tube put out compared to the fluorescent tube it replaces?
The T8 LED version draws 8.9 watts and delivers 1600 lumens. That is the trade: a fraction of the wattage of a conventional T8 fluorescent at a usable lumen output for general commercial space. Keep the lumen figure in mind when you are replacing tubes one fixture at a time, since output differences next to remaining fluorescent lamps will be visible.
7) Is there another dimmable LED lamp family I can use if I need shapes beyond A19 and T8?
The MasterClass InstantFit family covers two formats only, A19 with an E26 screw base and the T8 linear tube with a G13 base. For other shapes, the Sylvania Ultra LED series is a dimmable LED lamp line offered in multiple shapes, and the Topaz LP166 series covers dimmable PAR16 reflector lamps for track and recessed cans.
8) Will a Topaz LP16630K PAR16 lamp work as a substitute for the MasterClass InstantFit lamp?
No - it is a different lamp format. The Topaz LP16630K is a dimmable LED PAR16 directional reflector lamp at 3000K, intended for track and recessed accent fixtures. The Philips MasterClass InstantFit family covers an A19 bulb on an E26 medium screw base and a T8 linear tube on a G13 double-ended base, both 5000K daylight, for general ambient lighting. The two are both dimmable but are not interchangeable in the same fixture.
9) Is 80 CRI good enough for retail display lighting?
80 CRI covers everyday visual tasks, general office work, warehouse and circulation space, and most general retail. Where color judgment is the job, paint matching, cosmetics, fabric, fresh food, buyers typically specify 90 CRI or better. For that work the 80 CRI MasterClass InstantFit lamp is the wrong tool.
How fast can I get the Philips Lighting 550442 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Philips Lighting 550442 come with a warranty?
Absolutely. The Philips Lighting 550442 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 550442?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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