Verilux HappyLight · $$ · Updated March 3, 2026
Halo
Ranks #24 of 57 for melanopic output, below the 10,000 lux benchmark at 1 ft. No flicker at any setting.
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Is it strong enough?#24 of 57
No. Only 37% of the 10,000 lux benchmark at 1 ft.
3,695 m-EDI at 1 ft · 965 at 2 ft
Is it comfortable to sit in front of?Standard
Mostly. Moderate glare.
105 at 1 ft · 28 at 2 ft · median 112
Does it flicker?No risk
No, at full power or dimmed.
0.5% modulation at max
Flicker index
0.0010
SVM
0.003
What does the light look like?5150K
Cool daylight, decent color.
CRI Re 80 · R9 26 (weak deep reds)
2700K warm7500K cool
All test data
Light outputMeasured at 1 ft and 2 ft
m-EDI
3,695
965 at 2 ft
Lux
4,755
1,255 at 2 ft
CLa
6,320
1,480 at 2 ft
Glare
105
28 at 2 ft
m-EDI 3,695 at 1 ft, 965 at 2 ft
Median 3,43010,000 benchmark2 ft1 ft
Glare 105 at 1 ft, 28 at 2 ft
Median 1122 ft1 ft
SpectrumOutput at the highest setting
Melanopic DER
0.78
m-EDI per lux. Daylight (D65) is 1.0.
CCT
5150K
3 levels
Gap from natural light
29%
Far. Average spectral difference (ASD) from daylight at the same color temperature, 425 to 690 nm.
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
Percent flicker
0.5% · n/a
Flicker index
0.0010 · n/a
SVM
0.003 · n/a
PstLM
0.013 · n/a
Assist Mp
0.027 · n/a
Waveform, 1 second
A flat line near 1.0 means steady light.
Color renderingHow accurately colors and skin tones look under this lamp
CRI Re
80
R9 (deep red)
26
TM-30 Rf
85
TM-30 Rg
97
Slightly desaturated (100 is neutral)
Specifications
- Form factor
- Desktop
- Brightness
- 4 levels
- Color temperature
- 3 levels
- Power
- 19 W
- Voltage
- 100-240V
- Cord length
- 5.9 ft
- Mounting
- None
- Extra features
- Battery powered, Built-in timer
- Available in
- United States, Canada, United Kingdom
