Being that old it would use more power than a more modern unit but that is relative. That unit is speced as using 125 VA MAX which is roughly the same as saying it uses 125 watts maximum. The fuse is only a 1.25 amp. It likely uses no more than a 60-100 watt light bulb. All devices should have a power consumption spec on the case somewhere usually near the AC power cord connection. I would not be concerned about the power consumption but would upgrade simply to get something newer and better.
