Lewis Hamilton's run of form continued in Bahrain on Friday night when the Mercedes driver claimed the first P1 under the lights.
This season, to mark the 10th running of the Bahrain Grand Prix, the race has become a night event with hundreds of spotlights shinning down on the desert track.
Hamilton led the way under lights as the British driver posted a 1:34.325 on the soft Pirelli tyres. It was yet another P1 for the 2008 World Champion, the winner of the last race in Malaysia.
Continuing the Brackley team's domination, Nico Rosberg brought his W05 across the line with the second fastest time, 0.365s down on his team-mate.
Fernando Alonso was the closest challenger to the Merc duo as he posted a 1:35.360. That, though, put the Ferrari driver a full second behind Hamilton while Daniel Ricciardo was fourth for Red Bull Racing ahead of Felipe Massa, Jenson Button and Sebastian Vettel.
And although the Mercedes drivers had a notable advantage, it was close behind them as from Alonso in third to Kimi Raikkonen in 14th there was just a second separating the runners.
Meanwhile there were again issues for Lotus as Pastor Maldonado damaged his E22 when he flew over a kerb while Romain Grosjean suffered a misfire. They did, however, each complete more than 20 laps.
Two other drivers, Max Chilton and Marcus Ericsson, didn't see the end of the 90-minute session as car problems meant they stopped out on track while Adrian Sutil had an electrical problem that cost him track time.
01 Lewis Hamilton Mercedes 1:34.325 28 laps
02 Nico Rosberg Mercedes 1:34.690 +0.365 31 laps
03 Fernando Alonso Ferrari 1:35.360 +1.035 28 laps
04 Daniel Ricciardo Red Bull 1:35.433 +1.108 28 laps
05 Felipe Massa Williams 1:35.442 +1.117 13 laps
06 Jenson Button McLaren 1:35.528 +1.203 21 laps
07 Sebastian Vettel Red Bull 1:35.606 +1.281 29 laps
08 Daniil Kvyat Toro Rosso 1:35.640 +1.315 31 laps
09 Kevin Magnussen McLaren 1:35.662 +1.337 22 laps
10 Sergio Perez Force India 1:35.802 +1.477 40 laps
11 Valtteri Bottas Williams 1:35.920 +1.595 9 laps
12 Jean-Eric Vergne Toro Rosso 1:35.972 +1.647 32 laps
13 Nico Hulkenberg Force India 1:35.998 +1.673 18 laps
14 Kimi Raikkonen Ferrari 1:36.366 +2.041 32 laps
15 Adrian Sutil Sauber 1:36.962 +2.637 13 laps
16 Esteban Gutierrez Sauber 1:36.975 +2.650 35 laps
17 Pastor Maldonado Lotus 1:37.259 +2.934 24 laps
18 Romain Grosjean Lotus 1:37.599 +3.274 23 laps
19 Jules Bianchi Marussia 1:37.800 +3.475 15 laps
20 Max Chilton Marussia 1:38.247 +3.922 10 laps
21 Kamui Kobayashi Caterham 1:38.257 +3.932 33 laps
22 Marcus Ericsson Caterham 1:39.136 +4.811 30 laps
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