Fernando Alonso says that the different conditions due to driving under the floodlights in Bahrain means Ferrari is 'starting from scratch'.
Alonso was third quickest during the second practice session underneath the lights but reckons that the team has to learn a lot, despite completing two pre-season tests at the circuit.
"After many daytime races, it was really strange to be running here in the dark even if it was not very different to the other night time races, so we just have to get used to it" he said.
"From this aspect, today was very useful, especially FP2, to learn about the behaviour of the tyres and the car.
"Even if we did a lot of running here in winter testing, now it’s like starting from scratch and one has to adapt to the new indications coming from the differing track conditions."
Alonso urged Ferrari not to overreact to their one second deficit to Mercedes during the second session.
"We know our strong points and the areas we must focus on to improve, but we must not overreact in trying to close the performance gap," he said.
"At the moment we must make steady progress while still keeping an eye on reliability, which has brought us a good points haul in the first couple of races, which is always very important."