your plant will bud when you make it think its summer coming to a close by giving it 12/12 equal hours of light and darkness budding is triggered by a hormone that is activated by the absence of light.
god made it this way so growers wouldnt get confused.
giving light during the dark hours will turn your plant into Caligula in short it will hermie.
buy 20 budget low energy bulbs and the fittings ( bulbs are a pound in poundland ) fittings are £1.29 in wilcos mount them on a piece of 1m x 1m 5 mm MDF wooden board and you'll have all the lighting you need to complete your grow.
good luck mate
p.s. If you are vegging up you can leave your lights on 24 hrs a day then change to 12/12 when you are ready . try looking for george cervantes videos on youtube and read read read read all you can, theres no substitute for experience but thorough research from RELIABLE KNOWLEDGEABLE scources will set you up with a feel for growing,
G