The curing wavelength will depend on the used photoinitiator. Most photoinitiators have effective absorption on the UV length. On the other hand, some photoinitiators such as Camphorquinone have a considerable absorption up to 465 nm and may be used to cure in the visible light.
More information about the longest absorbed wavelength (nm) can be find at Article Industrial Photoinitiators: A Technical Guide. by W. Arthur Green.