How dim can these get quantitatively? Do these go down to 1%, or only 10% or 20% before the next step is just off?

Coming from someone in the industry, retrofit lamp dimming generally has less to do with the bulb and more to do with the dimmer. Some lighting control companies will have a list of products they have tested with their dimmers and how far it will dim down. You can expect with most dimmers 5-15%, higher end dimmers from more reputable companies will probably more consistently get you to 5% maybe to 1%. Electronic low voltage dimmers generally work better with LED's, if you have an older dimmer from the days of incandescent you probable will be looking at 15% and then off.

What is the difference between "title 20 compliant" and not? They seem identical: same lumens and wattage, but priced wildly differently.

Well, the title 20 compliance is for California only. If you don’t live in California you don’t need to buy them. Besides that’s a six pack. The other one is a four pack and that’s the one I bought. They’re dimmable, warm glow. I really enjoy them, they’re so easy on your eyes. For you I would recommend this one.

Will bulbs turn off completely when using a dimmer? some led bulbs remain on slightly.

That's more about the dimmer than about the bulb. If the dimmer shuts off completely, the bulb shuts off completely. If the bulb requires more power than the dimmer's lowest setting to put out a meaningful amount of light, then it will appear off. We just use dimmers to adjust light level and use the dimmer switch's switch function to turn on and off. If I turn the dimmer all the way down, these are still lit softly, that's our specific dimmers (Lutron toggle dimmers).

Are these suitable for a damp location such as a bathroom?

That’s where mine are. So good, so far!

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PHILIPS LED A21 Ultra Definition Dimmable LED Light Bulbs - Flicker-Free 100w Light Bulbs with EyeComfort Technology - Soft White 2700K Lightbulb - 1600 Lumen - E26 Base - 2 Pack

PHILIPS LED A21 Ultra Definition Dimmable LED Light Bulbs - Flicker-Free 100w Light Bulbs with EyeComfort Technology - Soft White 2700K Lightbulb - 1600 Lumen - E26 Base - 2 Pack

Product ID: 468246398

Details

Brand
PHILIPS
Bulb Shape Size
A21
Light Type
LED
Special Feature
Dimmable
Wattage
100 watts

⏳15,000 hours long-lasting life

🎨CRI 95 for true-to-life colors

💡1600 lumens ultra-bright output

EC$138

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Description

💡 Light up your life with brilliance and comfort — don’t miss out on the future of lighting!

BUILT TO LAST FOR YEARS - With up to 15,000 hours of life, these bulbs keep your space brilliantly lit for over a decade.
CUSTOMIZE YOUR AMBIENCE - Smooth dimming down to 10% lets you set the perfect mood for work or relaxation.
SUSTAINABLY SMART PACKAGING - Eco-conscious design with recycled paper packaging, because style should be responsible.
SEE EVERY DETAIL IN TRUE COLOR - Experience vibrant, natural lighting with a high CRI of 95 that brings your space to life.
EYE COMFORT CERTIFIED FOR ALL DAY USE - Flicker-free, soft white light designed to reduce eye strain and keep you focused.

The PHILIPS LED A21 Ultra Definition Dimmable Light Bulbs deliver 1600 lumens of soft white light with a superior CRI of 95 for true color accuracy. Engineered with EyeComfort technology, these flicker-free bulbs reduce eye strain and offer smooth dimming down to 10%. Designed for sustainability with recycled packaging, they boast a long lifespan of up to 15,000 hours, making them a smart, eco-friendly upgrade for any indoor space.

Specifications

ASIN	B0B8TMM25D
Additional Features	Dimmable, Energy Efficient
Best Sellers Rank	#49,832 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2,956 in LED Bulbs
Brand Name	PHILIPS
Bulb Base	E26
Bulb Shape Size	A21
Color	Soft White (2700k)
Color Rendering Index	95
Color Temperature	1600 Kelvin
Connectivity Technology	Normal bulb
Control Method	App
Controller Type	Push Button
Customer Reviews	4.2 4.2 out of 5 stars (85)
Efficiency	High
Frequency	60
Incandescent Equivalent Wattage	100 watts
Included Components	2 A21 Bulbs
Indoor Outdoor Usage	Indoor
Item Dimensions W x H	5.3"W x 6"H
Item Type Name	Light Bulb
Item Weight	6.24 ounces
Light Color	Soft White
Light Output Maximum	1600 lumens
Light Source Operating Life	15000 hours
Light Source Type	LED
Light Source Wattage	13.5 watts
Light Type	LED
Manufacturer	Signify North America Corporation
Manufacturer Part Number	573667
Manufacturer Warranty Description	3 year manufacturer warranty.
Material Type	Glass
Model Name	PLC 12.5W(100W) A21 SW WG LED UDF 2PK
Model Number	573667
Number of Items	2
Package Quantity	1
Power Consumption	100 watts
Shape	Arbitrary(A)
Specific Uses For Product	Decoration
Style Name	2 Count (Pack of 1)
UPC	046677573669
Unit Count	2 Count
Voltage	120 volts
Wattage	100 watts
White Brightness	1600 lumens

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