Does This bulb turn on immediately or within seconds . I bought one for the bathroom to replace and old one and it takes a minute to warm , too long

This is still a fluorescent bulb, so it takes a second or less to turn on, and then depending on ambient temperatures in the room, a minute or so to come to full brightness as any fluorescent would do. If you want instant on and instant full brightness, you might want to consider LED technology. I hope that helps.

one light bulb came broken

Mine came broken too, Amazon replaced it in 5 days.

The current bulb is the original that came with the ceiling recessed bathroom light. it is model f42tbx/827/a/4p. will this work?

Yes, that is a good cross, but the color, or Kelvin temps will be different. If you want to match what you took out of there, the 2700K, then the 20887, CF42DT/E/IN/827/ECO is what you want. The one you selected here is a cool white, or 4100K, and isn't as warm in color, it's more cool. But either one will work with the ballast you currently have and the fixture you have.

Yes, it's dimmable. Any fluorescent with 4 pins total, is dimmable as long as there is a dimmable ballast that is compatible to go with it. SYLVANIA makes the 51836 dimmable ballast for this.

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Description

💼 Light up your productivity with power and style!

ENDURANCE CHAMPION - Lasts up to 16,000 hours—set it and forget it for years of reliable illumination.
ECO FRIENDLY SMART - ECOLOGIC design with integral end-of-life (EOL) feature supports sustainability and safety.
SEAMLESS COMPATIBILITY - 4-pin GX24Q-4 base fits electronic and dimming ballasts for versatile installation.
POWER SAVVY PERFORMANCE - 42 watts of efficient energy use means lower bills without sacrificing brightness.
BRILLIANT COOL WHITE GLOW - 4100K color temp delivers crisp, professional lighting that energizes your workspace.

The Sylvania 20890 is a 42-watt compact fluorescent lamp featuring a 4-pin GX24Q-4 base, delivering 3200 lumens of cool white light at 4100 Kelvin. Designed for indoor use with electronic and dimming ballasts, it offers an impressive 16,000-hour lifespan and an 82 CRI for true color rendering, making it an energy-efficient, long-lasting lighting solution perfect for professional environments.

Specifications

Brand	LEDVANCE
Light Type	Fluorescent
Special Feature	Base GX24Q-4, Voltage, Wattage 42W
Wattage	42 watts
Bulb Shape Size	T4
Bulb Base	E26
Incandescent Equivalent Wattage	42 Watts
Specific Uses For Product	Lamp
Light Color	Cool White
Voltage	120 Volts
Unit Count	1.00 Count
Color Temperature	4100 Kelvin
Number of Items	1
Brightness	3200
Shape	T4
Material	Glass
Model Name	20890
Indoor/Outdoor Usage	Indoor
Power Source	AC
Color Rendering Index	82
Power Consumption	42 Watts
Item Package Quantity	1
Light Source Type	Compact Fluorescent Light (CFL)
Item Weight	0.1 Pounds
Light Source Wattage	42 Watts
Product Dimensions	1.9"W x 6.9"H
Accepted voltage frequency	100 to 120 Volts and 60 Hertz
Control Method	App
Average Life	16000 Hours
White Brightness	3200 Lumens
Efficiency	76.19 LPW
Style	42W
Global Trade Identification Number	00046135208904
Manufacturer	LEDVANCE LLC
UPC	046135208904
Part Number	20890
Item Weight	1.6 ounces
Item model number	20890
Is Discontinued By Manufacturer	No
Size	1 Count (Pack of 1)
Color	Cool White
Special Features	Base GX24Q-4, Voltage, Wattage 42W
Batteries Included?	No
Batteries Required?	No

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