Our team is using these solenoid actuators:
http://www.amazon.com/400mA-Frame-So...productDetails
It's a bit late, but we wanted to make absolutely sure we satisfy R18, specifically that they have a "rated electrical input power no greater than 10 watts (W) continuous duty at 12 volts (VDC)". Since the specs don't list a power rating, we used P=IV to calculate that (.4A)*(12V)=4.8W. Was this the correct approach? Thanks!