HDR Light Studio
It might be interesting compatibility with HDR Light Studio to manage and generate a set of more professional lights.
since it is mainly a rendering software and using it as the HDRI lighting system, I think you have more control of HDRI maps is appropriate!
james michaelsen commented
interesting app. not sure if it could be adapted to "felix"
not bad for low render in .png but is posible to add some light option in the futur version like ligthmap HDR studio.