Yes, it will be totally fine. It'll actually improve your grow. As new led lights have a higher and different level of spec needed for different stages. I'd change right away. You will notice a drop in temp by a few degrees so depending on your area and if you have seasonal weather you should take this into account. Also stick to the same lighting times. But if you wanna put in and change to flowering that'll be also fine. Best of luck pal.
Hello. Yes, I bought a SF4000 a bit ago and I think the new led will work better than the hps. It's more of a full spectrum of light. And the IR lights really help in flowering. Quite ID picture too! Chuck.