@Lil Dab A subject I looked into a while ago .
315-400 nm UVA and near-ultraviolet light
- UVA and near ultraviolet light from 315-400 nm is considered one of the longest UV light wavelengths and it can enhance plant pigmentation, thicken leaves and may even help manage insect populations. It’s at this wavelength that chlorophyll absorption starts and light is used to manage plant architecture and long-term health.
Unlike UV-B Light which has minor side-effects, UV-A Light is excellent without any cons. If you introduce your plants to this light during the growth cycle, it will lead to strong and more beautiful plants that are susceptible to fungus and every other form of pest-related attack. In some instances, it is also known to improve the appearance and taste of fruits and veggies. UV-A light is naturally present on earth and we are known to receive around 98% of this light.
Just some of the info found .