Bunnyhopping won't help! Your bike's got an aluminium frame, I think. Traffic light sensors (and I assume this one's no different) detect iron or steel with a sort of magnetic loop thing buried in the ground. You can usually see where the tarmac's been cut and patched to put it in. Aluminium's not magnetic. You could try leaning the bottom bracket/pedals* closer to the bit in the ground just before the stop line that looks as if it's been cut. This looks weird, but does sometimes work.
The other thing that gets traffic light sensors to work is to inform the roads department of the council that the sensor in question isn't sensitive enough. This is something that can be adjusted quite easily, apparently. I've done this in the past and traffic lights that didn't work for me before started working following an e-mail to the cuddly lion ...
* - basically anything likely to be a lump of steel. (Hmmm - thinking about it I do have a bunch of magnets a bit more than a foot off the ground at the front end of the bike. Another advantage of a dynohub??)
