HydroPar 4K HMI’s with wide reflectors are very useful in helping to light center top portion of underwater bluescreens. Lighting the lower portion of the underwater bluescreen is accomplished by spacing HydroPar 1.2K HMI’s out evenly along the pool bottom. For Tungsten lighting, substitute HydroPar 5K’s for the 4K HMI’s and HydroPar 2K’s for the HydroPar 1.2K HMI’s.