Nightfall A19 LED Light Bulb

(1 customer review)


A Natural Nights Sleep

Reduces Alerting Blue Uplight By 700%

8W LED Replaces 60W Incandescent

Human sleep cycles revolve around the sun’s position in the sky — bright days and dark nights. Today, however, we spend most of our time indoors under constant artificial light.

BIOS Nightfall A-19 LED light bulb brings the outdoor beauty of a campfire indoors, reducing unwanted alerting blue uplight by 700% to create a tranquil evening environment that is not only conducive for a better nights sleep but also helps the environment by reducing skyglow.

Biological Benefits

  • Facilitates Sleep Initiation
  • Promotes Sleep Consolidation
  • Reduces Skyglow


  • 0.83 Daytime Melanopic  Ratio
  • 83 Daytime CRI
  • AC-120V / 60Hz
  • Standard E26 white base
  • Brightness: 650 lumens
  • Light color 1900K – 3500K
  • Estimated life (based on 3 hours/day):  13.7 years
  • Estimated Energy cost:  $1.08 per years

To check out what dimmers are compatible, please click here.

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SKU: NFL-822-A21 Categories: ,

Biological Benefits

  • Facilitates Sleep Initiation 
  • Promotes Sleep Consolidation
  • Reduces Outdoor Skyglow
  • Reduces Alerting Blue Uplight by 700%


  • Lamp Type: A19
  • Lamp Base: E26 (Medium)
  • Power (W): 8W
  • Voltage: 120V
  • Rated LIFE (YEARS): 13.7
  • CCT: 2200K
  • CRI (Ra): 90
  • R9 >50
  • Light Output (lumens): 600 lm

Download the full spec sheet below. 

BIOS Nightfall Spec Sheet



  • Do they work in 220-240V countries?
    • No, they only work in 110-120V countries at this time.
  • Do they come in different sizes?
    • Not at the moment.
You can see a big difference in the reduced uplight! Left lamp has Nightfall and right lamp has a generic LED bulb. Loving this bulb for table and bedside lamps!

1 review for Nightfall A19 LED Light Bulb

  1. Avatar

    Patrick Ciri

    These bulbs are amazing! The warm light makes you feel as if you are under the moonlight.

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