Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12879-021-06310-5/MediaObjects/12879_2021_6310_Fig3_HTML.png)
Temporal variation of the normalized integrated irradiance of the three lamps in the first 2 min after being switching on
Temporal variation of the normalized integrated irradiance of the three lamps in the first 2 min after being switching on