Beurer · $$ · Updated March 3, 2026
TL 20
Ranks #49 of 57 for melanopic output, below the 10,000 lux benchmark at 1 ft. No flicker at full power.
Affiliate disclosure: this page contains affiliate links. I may earn a commission at no extra cost to you.
Is it strong enough?#49 of 57
No. Only 21% of the 10,000 lux benchmark at 1 ft.
2,075 m-EDI at 1 ft · 555 at 2 ft
Is it comfortable to sit in front of?Standard
Mostly. Moderate glare.
109 at 1 ft · 29 at 2 ft · median 112
Does it flicker?No risk
No, at full power. Dimmed not tested.
0.4% modulation at max
Flicker index
0.0002
SVM
0.004
What does the light look like?6450K
Cool daylight, muted color.
CRI Re 75 · R9 5 (weak deep reds)
2700K warm7500K cool
All test data
Light outputMeasured at 1 ft and 2 ft
m-EDI
2,075
555 at 2 ft
Lux
2,310
610 at 2 ft
CLa
3,330
825 at 2 ft
Glare
109
29 at 2 ft
m-EDI 2,075 at 1 ft, 555 at 2 ft
Median 3,43010,000 benchmark2 ft1 ft
Glare 109 at 1 ft, 29 at 2 ft
Median 1122 ft1 ft
SpectrumOutput at the highest setting
Melanopic DER
0.90
m-EDI per lux. Daylight (D65) is 1.0.
CCT
6450K
Fixed
Gap from natural light
31%
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 not tested
Percent flicker
0.4%
Flicker index
0.0002
SVM
0.004
PstLM
0.066
Assist Mp
0.044
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
75
R9 (deep red)
5
TM-30 Rf
82
TM-30 Rg
92
Slightly desaturated (100 is neutral)
Specifications
- Form factor
- Compact / travel, Desktop
- Brightness
- Fixed
- Color temperature
- Fixed
- Power
- 7 W
- Voltage
- 100-240V
- Cord length
- 5.8 ft
- Mounting
- None
- Extra features
- Works with a smart plug
- Available in
- European Union, Australia
