looking down

it may be a novice question. Lower leaves of the plant, looking down. what would be the reason?

edit : 250w MH, lightmix - allmix soil mix, 27C LightOFF 30C LightON, 7 PH watering.

If your plant is bushy then it could just be lack of light due to the canopy. Are they curly or just looking down?

they just looking down. for the fix can i do " LST "?