Electrical Solenoid Actuators

[StephenNutt]

Looking at 4.1.8 park J we are now allowed:

electrical solenoid actuators, no greater than 1 in. stroke and no greater than 10 watts continuous duty

Can someone explain the following.

no greater than 10 watts continuous duty

Can I use an actuator that is 25 watts at a 10% duty, but drops below 10 watts at 100% duty, or must the maximum power be no greater than 10 watts?

Also, now I know this is probably very difficult to answer as it varies upon actuator design, but what range of forces could I expect to obtain using actuators that meet these requirements?

Many thanks

Stephen