Yuji: WELL24 Nite 2200K A19
Yuji WELL24 Nite 2200K A19 light bulb test results
The verdict
A 2213K LED A19 bulb, now discontinued. Its color rendering is fair (CRI 82, R9 54) and its body-clock signal is low (27% of daylight).
A solid everyday bulb with no major weakness in my tests. It is no longer sold.
CRI 82 · Rf 80
CRI Re, the average of all 15 samples (Ra 86). #64 of 84 white-light bulbs.
R9 54
Saturated red: skin, wood, food. 100 is perfect. #61 of 86 white-light bulbs.
2213K
Sold as 2200K. Gap from natural light 36% (far). Tint -0.0025, close to neutral.
27% of daylight
Melanopic DER 0.27. 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.
Sunlite Incandescent 2850K C7CRI 98 · R9 96 · 2344KWaveform Candelabra 2400K CA11CRI 96 · R9 85 · 2500KWaveform Lux24 2400K A19CRI 91 · R9 57 · 2457KSimilar bulbs
Still sold, near the same color temperature, same E26 base where one qualifies.
Specs
Power, brightness and efficacy marked "rated" are the manufacturer's numbers. I have not measured them yet.
- Brand
- Yuji
- Model
- WELL24 Nite
- Type
- LED
- Shape
- A19
- Base
- E26
- Finish
- Plastic
- Power (rated)
- 11W
- Brightness (rated)
- 1,000 lumens
- Efficacy (rated)
- 91 lumens per watt
- Dimmable
- Yes
- Sold as
- 2200K
- Measured
- 2213K
- Gap from natural light
- 36% (ASD)
- Tested
- Jun 17, 2023
- Instrument
- Handheld spectrometer (before the integrating sphere)
- Status
- Discontinued