LED vs HPS..? Is the change worth it?

Hi guys just thinking about buying a 600 watt led to change up from my 400 hps for the finish of my White Widdow grow from Robert. I do get high temps this way in summer and i have heard they are cooler, they also are cheaper to run… Is a 600 led comparable to a 400hps?
Thanx guys.

This is my widow from robert at 3 weeks flower. Almost finished the stretch and now time to get fat…