Will this bulb work with a dimmer switch?

Simplest answer is “don’t use a smart light bulb with a dimmer switch.” It’s much cheaper to purchase any of the Edison style dimmable lights and use an existing dimmer switch. That said, I would ditch the switch and use the Smart Phillips Hue Edison Style bulbs with your hub, Alexa or other. This is the ONLY smart bulb that works consistently and absolutely the only bulb with the white-warm capability you need. It is expensive- but you definitely get your money’s worth. I have 12 in different areas of my house- I use NO Phillips hub- it works great with my echo devices be they dot to my behemoth Echo 10! I can run all separately or as groups in a chandelier. Seriously, this is the bulb. But don’t use it with a switch - you completely negate the reason for a smart bulb. It’s redundant and you’ll miss the best lighting you’ve ever experienced!

What is the difference between st119 and a19 (unsure which vintage bulb to get)?

They both have the same e26 threads. The 19 means diameter in 1/8 of an inch, so 19/8 or 2.375 inches. The A and ST refer to shape. A19 is the size and shape of what was the most common incandescent bulb that we are used to. The ST is taller than the other. My experience with the ST19 is that the threads are a little shorter than most and will not fit in a lamp if the collar of the lamp is a slight bit taller than others.

Does this work with apple homekit

Hello, Yes, they should work fine with the apple homekit. If not we would gladly refund you.

Does this work with google assistant?

Yes it does, and adding them to google home is easier than the other answer thinks. Once added to the ue app, just open google home app and add it to a room. I tend to use the widget for the hue app myself. just tap a button (icon) to turn them on and off without all the talking.

Brand	Philips Hue
Light Type	LED
Special Feature	Color Changing, Dimmable
Wattage	7 watts
Bulb Shape Size	ST19
Bulb Base	E27
Incandescent Equivalent Wattage	40 Watts
Specific Uses For Product	Decoration
Light Color	Amber
Voltage	120 Volts
Unit Count	1 Count
Color Temperature	2100 Kelvin
Number of Items	1
Brightness	550 Lumen
Shape	ST19
Material	Glass
Model Name	Philips Hue Filament
Indoor/Outdoor Usage	Indoor, Outdoor
Power Source	Corded Electric
Color Rendering Index	80
Item Package Quantity	1
Light Source Type	LED
Item Weight	0.1 Pounds
Light Source Wattage	40 Watts
Product Dimensions	2.4"W x 5.2"H
Accepted voltage frequency	100 to 120 Volts and 60 Hertz
Control Method	App, Voice
Average Life	22 Years
White Brightness	550 Lumens
Efficiency	High
Style	ST19 (Old Version)
Global Trade Identification Number	00046677551780
Manufacturer	Signify North America Corporation
Color	White
UPC	046677551780
Part Number	551788
Item Weight	1.6 ounces
Item model number	551788
Size	1 Count (Pack of 1)
Pattern	Bulb
Special Features	Color Changing, Dimmable
Included Components	Smart ST19 Filament LED Bulb
Batteries Included?	No
Batteries Required?	No
Warranty Description	2 year manufacturer.

Philips Hue White Dimmable Filament ST19 LED Smart Vintage Edison Bulb, Bluetooth & Hub Compatible (Hue Hub Optional), Voice Activated with Alexa

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