Hello everyone

I can't find an answer to my question anywhere, I have high hopes that someone here can get me straight.

QUESTION: I have a 4'x4' grow tent along with 2- 2000/275 watt grow lights. If 1 light is putting 275 if I add the second 275 watt and it covers the same area as the other light will it be equal to 1 - 550 watt light I know wattage is going to vary , these are just rough numbers to determine about how much light my plants are getting with 2 lights vs 1

Thanks in advance