the 'ol lady came up with this one...awhile back, when I had 'Mongo, the 7 foot sativa.... Take some bread ties and big 'Nuts"
...you know...like, nuts and bolts...anyway, take a nut big enough to cause the top of the plant to somewhat naturally bend over, out of the lights/ceiling...fasten it with a bread tie, or I use a little 1/4 inch airtube and the little backflow filters that come with my airpumps and make a ring to slide the nuts onto, and I have a soft, non evasive way of bending the branches over when they get too tall...couldn't find pic, sorry