1. See illumination and illumination uniformity.
"Hygienic Requirements for Lighting Design and Installation of Ordinary Classrooms in Primary and Secondary Schools" requires that the classroom keep the illumination ≥300LX and the uniformity of the illumination ≥0.7. Many classrooms with practical fluorescent lamps are dazzling and dark, and the illuminance and uniformity are not up to standard.
2. See if there is anti-glare treatment.
Glare simply means that the brightness is too high in a certain part of the field of vision or the brightness changes too much before and after. Traditional lamps, such as fluorescent lamps, have a great glare effect, which is one of the important reasons for visual fatigue.
3. See if it contains harmful substances
Some lamps contain some harmful heavy metals because of the inferior materials used, which not only pollutes the environment, but also affects human health.
4. Look for the danger of stroboscopic and blue light.
Fluorescent lamps are generally equipped with inductive ballasts, which have serious stroboscopic effect. In order to adapt to the change of frequency, students' visual system will be adjusted too frequently. Moreover, fluorescent tubes with high color temperature (6500K) are too white and have too many blue light components, which may easily lead to students' excitement, fatigue and even insomnia.