hey, your temperatures are perfect. are you flowering or still vegging right now? If youre flowering right now then 30% humidity is a great place to be. Humidity at that level will help with your trichome production. for your vegging your humidity needs to be a little higher. 45-55% would be great for that, any more or less could cause problems. i suspect when you put that new 600W light in there the temperature will raise quite a bit. dont worry if your temps reach levels of say 84-85(definitely not ideal to have temperatures higher than this). as long as you have a proper air flow and watering schedule youll be golden. dont forget that higher temperatures mean the plant metabolizes faster (up to a point) so keep an eye on that. hope this helps somewhat