Lewis jumped into the W09 just after the lunch break and was soon back out on track, racking up the laps.
He gradually chipped away at his best time and concluded the day in fourth place with a 1:20.808, also set on Soft tyres. In total, the four-time World Champion put in 91 laps.
"It's been a good day," Lewis explained. "We've got through everything we needed and put good mileage on the car - it's been productive.
"The biggest challenge we faced today was to get the tyres working properly on this new track surface. The medium tyre was difficult to get working; the soft tyre is better for warm-up, but suffered with degradation. But we are learning all the time.
"Overall it's been a good start to the second test although there is not a whole lot to say at this moment. We have not worked too much on fine-tuning the set-up as we're mostly still gathering information.
"In the next couple of days, once we get into the long-runs and some shorter qualifying-style runs, we will get a better idea of where the car is."