Are they ready to harvest? It seems to be milk trichs and also 1/3 Amber. These ladies are 70/30 Indica dominant.

In a 4x4 I personally wouldn't run less than 400w in flower but I build my own lights and my system isn't what you'd call typical. I have a 700+ watt build and an rdwc system with like 10 5lb mushroom bags in a 4x4. I run it at 480 most of flower and bump it up to 600 the last week then back down for the final week or two. Never push it past 600 though. If you have the money I'd get something around the 400watt range to get the most out of your time. I'm addicted to overkill honestly. Led gardener has some good info on what to run to optimize your setup on their website too. You should check that out if you're interested.