Waveform: Superwarm 1700K A19
The verdict
A 1705K LED A19 bulb. Its color rendering is poor (CRI 80, R9 16) and its body-clock signal is low (19% of daylight).
Colors look flat under it. Fine for closets and hallways, weak for the rooms you live in.
CRI 80 · Rf 87
CRI Re, the average of all 15 samples (Ra 83). #67 of 84 white-light bulbs.
R9 16
Saturated red: skin, wood, food. 100 is perfect. #68 of 86 white-light bulbs.
1705K
Sold as 1700K. Gap from natural light 23% (moderate). Tint +0.0008, close to neutral.
19% of daylight
Melanopic DER 0.19. 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
No bulb I have tested near this color temperature renders color more truly. This one is the best I have measured here.
Similar 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
- Waveform
- Model
- Superwarm
- Type
- LED
- Shape
- A19
- Base
- E26
- Finish
- Plastic
- Power (rated)
- 10W
- Brightness (rated)
- 600 lumens
- Efficacy (rated)
- 60 lumens per watt
- Dimmable
- No
- Sold as
- 1700K
- Measured
- 1705K
- Gap from natural light
- 23% (ASD)
- Tested
- Feb 6, 2023
- Instrument
- Handheld spectrometer (before the integrating sphere)
- Status
- Available