welcome to RIU emilyblunt...............check out this thread it should give you the info you need .........https://www.rollitup.org/newbie-central/937-how-grow-marijuana.html
peace
2700k will do for the whole grow.... lowryder is autoflowering so it will only be in veg for 3 weeks so it shouldnt make to much difference not using the 6500k