Here is the full list of all 13 Light achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Wear a disguise ‘15’ times
Complete the mission ‘Captured’
Complete the mission ‘Studio’
Complete the mission ‘Departure’
Complete the mission ‘Check In’
Complete the mission ‘Airport Car Park’
Complete the mission ‘Server Downtime’
Complete the mission ‘After Hours’
Complete the mission ‘Lobby’
Complete the mission ‘Confront Pascal’
Complete the mission ‘Food Hall’
Complete the mission ‘The Target’
Complete the mission ‘New Beginnings’