ECL's are great. However, the occasion that we filled up with smoke in the cockpit, the checklist could not be read. The FO could not see the Pack switches above his head. They were at least able to be found by feel from the other seat. ECL's and QRH's are great, sometimes the situation may make it hard to follow them. In light of the most recent 777 electrical anomalies, a continuous concern of mine has always been the time it takes to get down to essential only power by the checklist when in a smoke or fire situation.