I wondered about that...200w is barely enough to run a TV.
The comments about wire/fuse sizing are still true though. It is definitely not a good idea to "upgrade" a fuse to over 3 times the capacity without making sure the wiring is capable of handling the current. The expected load is irrelevant as fuses are there to protect the wire from starting a fire when things go wrong.
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2013 Rockwood 8289WS w/Diamond pkg
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)