Lighter valve springs = more horsepower?

If lighter springs are able to be used without increasing the risk of valve float, would it increase horsepower? Titanium valves and keepers are usually used to decrease the risk of valve float at higher RPMs. Now if valve float wasn't a problem in this engines RPM range, if cost wasn't an issue and titanium valves and keepers were used could lighter valve springs be used and would you see a noticeable increase in horsepower?