Yuji: SunWave 4000K A19
Yuji SunWave 4000K A19 light bulb test results
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The verdict
A 4115K LED A19 bulb. Its color rendering is excellent (CRI 97, R9 98) and its body-clock signal is high (74% of daylight).
One of the most accurate bulbs I have tested. A strong pick wherever color matters: kitchens, bathrooms, vanities and art.
CRI 97 · Rf 93
CRI Re, the average of all 15 samples (Ra 97). #14 of 84 white-light bulbs.
R9 98
Saturated red: skin, wood, food. 100 is perfect. #3 of 86 white-light bulbs.
4115K
Sold as 4000K. Gap from natural light 9% (very close). Tint +0.0021, close to neutral.
74% of daylight
Melanopic DER 0.74. 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.
Norb Smile Soft 4000K A19CRI 98 · R9 93 · 4226KSimilar bulbs
Still sold, near the same color temperature, same E26 base where one qualifies.
Same line, other versions
Other Yuji SunWave bulbs I tested.
Specs
Power, brightness and efficacy marked "rated" are the manufacturer's numbers. I have not measured them yet.
- Brand
- Yuji
- Model
- SunWave
- Type
- LED
- Shape
- A19
- Base
- E26
- Finish
- Plastic
- Power (rated)
- 11W
- Brightness (rated)
- 1,100 lumens
- Efficacy (rated)
- 100 lumens per watt
- Dimmable
- Yes
- Sold as
- 4000K
- Measured
- 4115K
- Gap from natural light
- 9% (ASD)
- Tested
- Jun 17, 2023
- Instrument
- Handheld spectrometer (before the integrating sphere)
- Status
- Available