Jeff Jones’ men fell 20 points behind after the break as the Lions built up a healthy lead at their new home in the first BBL game of the new season.
A gritty resurgence for the Giants, in the end, came to nothing.
The Giants – without the injured Dave Aliu – got to within a point of their hosts before the Lions held on for the win.
Rob Marsden was the Giants’ stand-out player on his club debut, claiming 19 points. Stefan Gill was also in double figures with 14.
The Giants will go looking for their first win at Wright Robinson on Sunday against Sheffield Sharks. Get down and support the team at 5.30pm.
Lions v Giants stats HERE