Par readings from the photone app or any other reader

It really won't affect your personal home grow diddly squat. Just use the recommendations that came with the instructions for YOUR light. Tiny, tiny, tiny details and variances in nano quantities will not affect your plants overall well being to any home grown noticeable or quantifiable amount. It may be 0.0001% THC either way or half a seconds extra or less growth over 12 weeks. All light is converted into energy and all energy is used equally wherever there is growth occuring. A plant can not direct energy anywhere, it is all divided equally. A plant can not think "leaf alpha bravo charlie 639 in quadrant 8 is only receiving 69% of the light as leaf delta echo foxtrot 95 in quadrant 74, so we must do something about it"! These things are gimmicks to make money. They will not turn ordinary plants into super plants. They are designed by people to sucker in (stoned) people into thinking they are missing out on something and are about getting you to spend your money with them. FMO, nothing more, nothing less. Generally with lighting, I go with 100% and veg and bloom spectrums both switched on, from day one until harvest day. Seedlings at roughly 24 inches, veg at roughly 18 inches and bloom at roughly 12 inches. Concentrate more on nutrition and watering, these will have a bigger effect than light distribution. Besides, how are you going to change anything to make your light behave differently. Better to focus on what you have, instead of what you might have. Greetings and salutations, Organoman.