Question for a botanical composition

Hello fellow artists and members,

I hope everyone is keeping safe and well.

I am about to start my first composition piece and would like to ask for some advise please;

I am thinking of drawing/painting 3 inflorescences of the same plant, in 3 different stages. Do I do the light as if on each individual inflorescence or light as if shining on all 3 next to each other? (If that makes sense)

Any guidance greatfully received,

Thank you,

Marie