So not necessarily bend toward the middle, but can bend the cola to the side.
Keep the top of the cola in the light, don't let it get above the light where there is no light for it.
When I first grew, I had a 400 W metal halide HID light. Small ineffective reflector hood. Lamp hanging vertical.
I was growing local sativa plants, before we could find Dutch indica heavy genetics in my country.
I would end up tying and bending the colas to form a kind of inverted bowl shape around the lamp.
Lower in the middle and higher around all the sides.
This was too keep all the tops the same distance from the lamp itself.
Shorter plants and tops in the middle, taller plants and tops on the edges.