Hi,
Plants respond to exposure to both UVA and UVB light; different plants respond in different ways, but in general studies have shown increased production of antioxidants / flavonoids and other natural sunscreen compounds in a process called photomorphogenesis.
UVA light alone can increase THC and CBD production in Cannabis plants. The combination of UVA and UVB light (from a standard "reptile bulb" fluorescent light) also increases THC and CBD production, but the inclusion of UVB in the light has noticeable detrimental effects on plant growth compared to only UVA. Best thing to do is do a little bit of research of your own just to clarify. Wouldn't want to be giving you the wrong information. 😀