Philips 473942 13T8/MAS/48-840/IF21/P/DIM 10/1 13W 48" T8 LED 4000K Cool White InstantFit Lamp

Product Overview

Philips 473942 13T8/MAS/48-840/IF21/P/DIM 10/1 13W 48" T8 LED 4000K Cool White InstantFit Lamp

The Philips 473942 (13T8/MAS/48-840/IF21/P/DIM 10/1) is a 13W 48" T8 LED InstantFit lamp from the Philips MasterClass line, rated for 4000K cool white light at 80 CRI (min). It ships with 2,100 nominal lumens and a 70,000-hour average rated life, and is designed as a direct plug-and-play replacement into existing T8 fixtures – no ballast bypass or rewiring required for compatible ballasts.

Wattage

13W

Bare Lamp

Color Temp

4000K

Cool White

Lumens

2,100

Nominal

UL Type

A, C

InstantFit

Rated Life

70,000

Hours

Technical Specifications

Philips Product Number (6nc)	473942
Ordering Abbreviation	13T8/MAS/48-840/IF21/P/DIM 10/1
Product Line	Philips MasterClass InstantFit
Lamp Length	48"
Base	G13 Bi-Pin
Bare Lamp Watts	13W
CRI (min)	80
Color Temperature	4000K (Cool White)
Nominal Lumens	2,100 lm
Beam Angle	180°
Lamp Material	Plastic
UL Type	A, C
Dimmable	Yes
Average Rated Life	70,000 hours (B50 L70, tested at ballast factor ≤ 0.88)
DLC Listing	DLC Product ID PPS0M8AQ
System Watts by Ballast Factor	Low (0.78): 14W · Normal (0.88): 16W · High (1.18): 21.5W
System Lumens by Ballast Factor	Low (0.78): 1,900 lm · Normal (0.88): 2,100 lm · High (1.18): 2,800 lm
Standard Package Quantity	10 per case
Mercury Content	Mercury-free (LED lamp)

Product Overview

This Philips InstantFit lamp is proven compatible with over 350 ballasts and drivers – UL Type A models like this one are designed to work directly with existing instant-start, programmed-start, and programmed-start-dimmable ballasts already in the fixture, so there's no need to bypass or rewire the ballast in most retrofit installations. Actual system wattage and light output depend on the ballast factor of the specific ballast driving the lamp; the manufacturer publishes figures at low (0.78), normal (0.88), and high (1.18) ballast factor, shown in the spec table above.

The plastic lamp body is rated for 70,000 hours to B50 L70 (the point at which half the LED sources have dropped below 70% of initial lumen output), tested at a ballast factor of 0.88 or lower. All InstantFit lamps carry a Stroboscopic Visibility Measure (SVM) below 1.0, meaning no perceivable flicker under NEMA77, IEC 61547, and IEC 63158 standards.

Compatible Applications

Direct retrofit into existing T8 fixtures using compatible instant-start, programmed-start, or programmed-start-dimmable ballasts
Commercial, retail, and office fixtures being converted from fluorescent to LED without full fixture replacement
Applications requiring DLC-listed LED replacement lamps for utility rebate programs (where DLC Product ID is listed)

Before Ordering – Verify

Confirm your existing ballast is on Philips' current InstantFit ballast compatibility list before ordering – not all ballasts are compatible, and compatibility is subject to change as more ballasts are tested
Confirm lamp length (48") and wattage (13W) match your fixture
If utility rebate documentation is required, confirm the DLC Product ID above is still active on the DLC QPL using the model number
Confirm dimming requirements – this lamp is dimmable

Safety and Handling Guidelines

Turn off power to the fixture before relamping
Verify ballast compatibility before installation – installing on an incompatible or unlisted ballast can cause the lamp to fail to strike or perform erratically
Handle by the base/end caps; avoid flexing or striking the lamp body
Dispose of / recycle in accordance with local electronics waste regulations