Ok thanks Stan for that explanation and confirmation, just wanted to make sure that I understood. Playing with mosfets is new turf for me, lol. Once the mosfets I ordered arrive I will test them out and see how they work. Should be very interesting. I will let you know how they behave, particularly during the power up stage!
Meanwhile yesterday I breadboarded another LED flasher circuit using a 555 timer chip, and it seems to work quite well. Quite stable over a wide range of supply voltages. Very easy to set a flash rate anywhere from about 3 or 4 Hz down to slower than about 1/2 Hz. I presume that mosfets could also be used with this type of circuit?
Thanks, Rod