Cisco Switching/Routing :: 2960 - How Much POE Watts Can Be Reduced On Certain Devices

I'm getting currently installing a full Valcom IP sound and clock system , along with all new Cisco 2960 gig ps-l switches. All devices run off of POE. In the past, I have read that most AP's only draw approx. 12.5 watts (va's). But you must take into account length of wire to add your additional draw which puts you at the 14.5 they auto draw.  My question being that the clocks I have auto draw 15.4 watts, which is eating up my 370w of power on my switches. The spec sheet on the clocks show only a power consumption of 4.5 watts.  So today I turned a few ports down to 4.5 watts and everything still worked fine.. Any experience by chance with Valcom devices or just turning the power down on devices in general? I can imagine that a clock is drawing enough to care about the length of the wire run.