as long as your not overdriving the crt cathodes , i wouldn't think a huge problem for home use .
however, extended operation at high levels can shorten crt life. ( 24/7 for a couple of years )
crt's are a vacuum tube . tube cathodes can produce electrons for a period of time before the material begins
to wear . as this occurs, the device beam current will drop ( weak tube ) . this applies to all hot cathode tubes
the rate of deterioration is affected by the beam current . high current /time = short life
qrz