Kinur: Sleep 1800K A19
The verdict
A 1905K LED A19 bulb. Its color rendering is poor (CRI 49, R9 -55) and its body-clock signal is low (12% of daylight).
A good pick for the last hours before bed: very little of the light that keeps you alert. Colors look orange under it.
CRI 49 · Rf 52
CRI Re, the average of all 15 samples (Ra 60). #84 of 84 white-light bulbs.
R9 -55
Saturated red: skin, wood, food. 100 is perfect. #83 of 86 white-light bulbs.
1905K
Sold as 1800K. Gap from natural light 54% (far). Tint +0.0077, leans green.
12% of daylight
Melanopic DER 0.12. Low is easier on sleep at night; high helps you feel alert by day.
The light
Measured spectrum, 380 to 780 nm, scaled to its peak.
How colors look
The red line pulls out where colors get more vivid and pinches in where they dull. Hover a bin for its numbers.
Where it ranks
Every white-light bulb I have tested, in its own light color. Left is warmer, up renders color more truly. Tap a dot to open that bulb.
This bulbOther bulbsFaded: discontinued
Truer color, same color temperature
Still sold, within 300K of this bulb, with a higher CRI.
Waveform Superwarm 1700K A19CRI 80 · R9 16 · 1705KGE Vintage 2000K ST19CRI 80 · R9 11 · 2080KGE Vintage 2150K A19CRI 78 · R9 8 · 2135KPhilips Vintage 2000K B11CRI 78 · R9 8 · 2034KSimilar bulbs
Still sold, near the same color temperature, same E26 base where one qualifies.
Same line, other versions
Other Kinur Sleep bulbs I tested.
Specs
Power, brightness and efficacy marked "rated" are the manufacturer's numbers. I have not measured them yet.
- Brand
- Kinur
- Model
- Sleep
- Type
- LED
- Shape
- A19
- Base
- E26
- Finish
- Plastic
- Power (rated)
- 7W
- Brightness (rated)
- 600 lumens
- Efficacy (rated)
- 86 lumens per watt
- Dimmable
- No
- Sold as
- 1800K
- Measured
- 1905K
- Gap from natural light
- 54% (ASD)
- Tested
- Feb 13, 2023
- Instrument
- Handheld spectrometer (before the integrating sphere)
- Status
- Available