2 x 39W with reflectors & 10hours and a new tank means algae farming here we come.
Reduce amount of light, remove reflectors (or twist and point them upwards if possible), put foil strips around the tubes, put stockings on the tubes, use darkened plastic sheet etc etc and reduce lighting period to even as little as 4 hours until things settle in.
When I started my planted tank, I ran my 180l with 2 x 25W T8 tubes, with reflectors twisted upwards and lights on for only 4-5hours a day for first couple of months and no green algae at all. Suffered diatom outbreak, standard new tank syndrome, but got all that scoffed by 3 Ottos. Twisted reflectors back round, upped lighting to 8-10hours and have run algae free for two years. Now moved to 2 x 35W HO T5, still algae free.