Harth: Nite Nite 1900K C35
The verdict
A 1947K LED C35 bulb. Its color rendering is poor (CRI 61, R9 -34) and its body-clock signal is low (20% of daylight).
Colors look flat under it. Fine for closets and hallways, weak for the rooms you live in.
CRI 61 · Rf 76
CRI Re, the average of all 15 samples (Ra 68). #77 of 84 white-light bulbs.
R9 -34
Saturated red: skin, wood, food. 100 is perfect. #79 of 86 white-light bulbs.
1947K
Sold as 1900K. Gap from natural light 33% (far). Tint +0.0016, close to neutral.
20% of daylight
Melanopic DER 0.20. 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.
GE Vintage 2200K ST19CRI 81 · R9 17 · 2240KGE Vintage 2150K A15CRI 81 · R9 17 · 2231KWaveform Superwarm 1700K A19CRI 80 · R9 16 · 1705KGE Vintage 2000K ST19CRI 80 · R9 11 · 2080KSimilar bulbs
Still sold, near the same color temperature, same E12 base where one qualifies.
Same line, other versions
Other Harth Nite Nite bulbs I tested.
Specs
Power, brightness and efficacy marked "rated" are the manufacturer's numbers. I have not measured them yet.
- Brand
- Harth
- Model
- Nite Nite
- Type
- LED
- Shape
- C35
- Base
- E12
- Finish
- Plastic
- Power (rated)
- 3W
- Dimmable
- Yes
- Sold as
- 1900K
- Measured
- 1947K
- Gap from natural light
- 33% (ASD)
- Tested
- Feb 12, 2023
- Instrument
- Handheld spectrometer (before the integrating sphere)
- Status
- Available