Discontinued Circadian Optics · $ · Updated October 3, 2026
Leo
Ranks #37 of 57 for melanopic output, below the 10,000 lux benchmark at 1 ft. No flicker at any setting.
This lamp is no longer sold new. I keep the test results here for anyone who already owns one or finds it used. See lamps still for sale →
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No. Only 29% of the 10,000 lux benchmark at 1 ft.
2,870 m-EDI at 1 ft · 765 at 2 ft
Mostly. Moderate glare.
242 at 1 ft · 66 at 2 ft · median 112
No, at full power or dimmed.
0.8% modulation at max · 2% dimmed
Cool daylight, decent color.
CRI Re 82 · R9 27 (weak deep reds)
All test data
Light outputMeasured at 1 ft and 2 ft
m-EDI 2,870 at 1 ft, 765 at 2 ft
Glare 242 at 1 ft, 66 at 2 ft
SpectrumOutput at the highest setting
Lamp outputBody-clock zone (melanopic, CIE S 026)Natural light, same color temperature
FlickerGreen is safe, amber is acceptable, red is past the limit
Full powerDimmed (2 of 3 (67%))
A flat line near 1.0 means steady light.
Color renderingHow accurately colors and skin tones look under this lamp
Specifications
- Form factor
- Desktop
- Brightness
- 3 levels
- Color temperature
- Fixed
- Power
- 15 W
- Voltage
- 100-240V
- Cord length
- 7 ft
- Mounting
- None
- Extra features
- None
