about 6 months back a black couple paid for my lady and my dinner...i never seen him before or since. i passed it on a couple weeks later.
i usually tip 20% even if the food sucks it's not the servers fault. if the server sucks i leave 5-10% n let em know why. i take into account how busy they...
i doubt very much that switching lights had anything to do with it. i would be more opt to believe it if you switch to a less intense light than you were using.
i've had pollen stay viable for 9-12 months.