Like the other Mikey mentioned above, this 'lights staying on' thing could be because the micro-switch on your brake pedal is still open, it's happened to quite a few Spyder Ryders over the years. So the next time this happens to you, try pulling the brake pedal up & see if the lights go off?! Failing that, getting some Contact Cleaner spray into that switch &/or the wiring plug might resolve the problem.... :dontknow:
If pulling the pedal up does work at getting the lights to switch off, then it could just be that the return spring is a little bit light for the pressure you've been putting on it - heavy boots, maybe

or is it possible that you've fitted a bigger brake pedal?! :shocked:
Fitting a bigger/wider brake pedal might make it easier for your foot to find the pedal, and that's great (necessary even!

) but they are also usually a tad heavier than the OE Pedal, so you
might need to help the return spring a little! :lecturef_smilie:
Regardless of the bigger pedal thing, there are threads & pics with details of suitable 'additional' or 'Extra' Return Springs that you can fairly easily fit to work in tandem with the OE Pedal Return Spring - you can search for details thru the Forum's Search Facility, or even thru Google, just add '
site:spyderlovers.com' to your search string if you do (that way, google will search the site, but do it in ways the site search engine can't! :sour: )
Or you can check out the attached pic below - it shows one I prepared earlier.... err, the extra spring some have used!

pps:
Good Luck! :cheers: