help

i got few question ... is my plant look like sativa or indica also im using 150 hp watts..the weather is getting hot..i got only one fan and my leaves are getting dry from the corners thas cus i need more ventilation or because i feed too much.... and my last question is time to put my plants on 12/12

She is looking ok just get some more fans.Stop giving her food only clean water for couple days.its look to me mix more indica then sativa..150w i think its time to flower when you change light 12/12 she stile will be veg for couple days or week.How big is your grow room?