AnyBoard said..
It depends on what people call light wind but on the very bottom end in 9 to 12 knots the only consistently successful method i have found is to gybe under the wing while its still flying to the edge of the window powered. Once you start flying inside the wing then you can pull on the top brake line while pushing the handle up and because you flew under and inside the wing the wing is now deep in the window when you spin it with the brake line. The method can be really graceful in the lightest of wind.
I sometimes still do the Heineken but so much can go wrong in super light wind and especially going from heels to toes. It feels cool when the wind is 12 to 15 but below that timing can be death and 5 minutes stuck in the water for me.
You can also just gybe and pull the A-line in the direction of travel - thats my approach with the pocket rockets, if there is enough wind to hold pressure they will pivot on axis and you're away. A benefit of this method is if its really sketchy you don't even need the wing to stay in the air, pull the A-line and gybe if there is not enough wind to keep pressure in the wing you end up in the same position as if you were doing a relaunch with the wing on your downwind side and the leading edge facing the wind and you can pump out in direction of travel to get air in the wing. If its lulled out I can get away with this in glass off conditions. Tacking works, but for me if I kook it in the transition I may drop off foil without speed which might not be recoverable, or not be able to generate apparent wind.