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BR40 Circadian Lightbulb LED screw-in lightbulb.
Overview
The BR40 Circadian Lightbulb is an LED lightbulb designed with a BR40 form factor and an E26 screw-in base. It features three selectable color settings intended to simulate natural lighting conditions throughout the day. The bulb’s lighting modes can be cycled by toggling the light switch, allowing the user to change between daylight, sunset, and campfire lighting.
Key Details
BR40 LED lightbulb format
E26 screw-in base
Three color settings: Daylight, Sunset, Campfire
Flicker-free LED lighting
Blue Light Free mode in Campfire setting
Low-EMF design
Lighting modes toggled by turning the light switch off and on within 8 seconds
Memory function returns to the most recently used setting after the light has been off for more than 8 seconds
Compatible with fixtures that use BR40 bulbs and E26 base connectors
Available as single unit, 4 pack, or 8 pack
How to Use
Install by screwing the BR40 bulb into an E26 base light fixture. Turn the light fixture off and back on within 8 seconds to cycle through the available lighting modes.
Why It Matters
This BR40 lightbulb provides multiple lighting modes within a single screw-in LED bulb, allowing users to switch between daylight, sunset, and campfire lighting using a standard light switch.

BR40 Circadian Lightbulb LED screw-in lightbulb.
Overview
The BR40 Circadian Lightbulb is an LED lightbulb designed with a BR40 form factor and an E26 screw-in base. It features three selectable color settings intended to simulate natural lighting conditions throughout the day. The bulb’s lighting modes can be cycled by toggling the light switch, allowing the user to change between daylight, sunset, and campfire lighting.
Key Details
BR40 LED lightbulb format
E26 screw-in base
Three color settings: Daylight, Sunset, Campfire
Flicker-free LED lighting
Blue Light Free mode in Campfire setting
Low-EMF design
Lighting modes toggled by turning the light switch off and on within 8 seconds
Memory function returns to the most recently used setting after the light has been off for more than 8 seconds
Compatible with fixtures that use BR40 bulbs and E26 base connectors
Available as single unit, 4 pack, or 8 pack
How to Use
Install by screwing the BR40 bulb into an E26 base light fixture. Turn the light fixture off and back on within 8 seconds to cycle through the available lighting modes.
Why It Matters
This BR40 lightbulb provides multiple lighting modes within a single screw-in LED bulb, allowing users to switch between daylight, sunset, and campfire lighting using a standard light switch.