Theralite · $$ · Updated March 3, 2026
Halo
Ranks #45 of 57 for melanopic output, below the 10,000 lux benchmark at 1 ft. No flicker at full power.
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Is it strong enough?#45 of 57
No. Only 25% of the 10,000 lux benchmark at 1 ft.
2,540 m-EDI at 1 ft · 675 at 2 ft
Is it comfortable to sit in front of?Standard
Mostly. Moderate glare.
156 at 1 ft · 41 at 2 ft · median 112
Does it flicker?No risk
No, at full power. Dimmed not tested.
0.1% modulation at max
Flicker index
0.0000
SVM
0.003
What does the light look like?3016K
Warm, decent color.
CRI Re 81 · R9 17 (weak deep reds)
2700K warm7500K cool
All test data
Light outputMeasured at 1 ft and 2 ft
m-EDI
2,540
675 at 2 ft
Lux
4,980
1,325 at 2 ft
CLa
4,475
1,140 at 2 ft
Glare
156
41 at 2 ft
m-EDI 2,540 at 1 ft, 675 at 2 ft
Median 3,43010,000 benchmark2 ft1 ft
Glare 156 at 1 ft, 41 at 2 ft
Median 1122 ft1 ft
SpectrumOutput at the highest setting
Melanopic DER
0.51
m-EDI per lux. Daylight (D65) is 1.0.
CCT
3016K
Fixed
Gap from natural light
30%
Far. Average spectral difference (ASD) from natural light 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 not tested
Percent flicker
0.1%
Flicker index
0.0000
SVM
0.003
PstLM
0.025
Assist Mp
0.013
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
81
R9 (deep red)
17
TM-30 Rf
86
TM-30 Rg
95
Slightly desaturated (100 is neutral)
Specifications
- Form factor
- Desktop
- Brightness
- 4 levels
- Color temperature
- Fixed
- Power
- 17 W
- Voltage
- 120V
- Cord length
- 5.3 ft
- Mounting
- None
- Extra features
- USB charging port, Wireless charging
- Available in
- United States, Canada, United Kingdom
