Leaf tips have been burnt for about 2 weeks mostly...

@Twistitallup hi mate Big drops in ph like that are not recommended as they can unduly stress your plant out even further If it rises a bit try to keep it @ around 6.2 to allow all nutrients to be available for your maturing plant. I doubt it's the lights but rather a case of temp being on the high side. This is the most important time of your plants life cycle when it comes to your final yield potential as this when the most bulking up happens between now and the final week Try to supplement with some cal mag and keep up the P+K Have plenty of fans blowing the air around and I'm sure you will attain a great result Best of luck