Lights on below FL100 is as far as i know something those IOSA audit guys want to see in your SOPs. But as someone mentioned above SOPs are for standard operation, sound jugdement might lead to a different conclusion for the situation at hand. Strobes and forward lighting in clouds are of course an example of that.
Of course our SOPs call for landing lights and runway turnoff lights on below FL100, logo lights during darkness. Outboard landing lights on with the landing clearance. Pretty standard stuff as far as i know. On the way up its all lights except taxy light on with take off clearance, outboard landing light off and retract with flaps up, the rest off at FL100.