Careful with that thing. 730nm will cause a similar reaction within the plant as being in the shade and cause cells to elongate. This is how branches can bend toward the light. The side of the branch facing light will have normal cells while the shaded side’s cells elongate causing a bend.

There are deep red (680nm photosystem !) and far red (700 nm photosystem II) and infrared (700-3000nm pure heat). IR is pure heat doesn’t activate any photosynthetic activity.