Building UVExposure unit by designing circuit, coding firmware and testing

After watching a lot of videos online to develop a pcb, What I have learned that a uv exposure unit is necessary for both pcb printing and solder masking, so I decided to make myself one which will have timer and brightness control with two types of led strip one is 365nm and another one is 395nm. As I have collected information that the uv resist film works better in 365nm wavelength and the solder mask works better in 395nm wavelength.