well... they need light just make sure it is not too warm.
BTW if you look around in petshops all fish do have special aquarium lights.
But it makes me sad again that he lives in a drinking glass sized cube. I realize that they are kept in similar conditions in the pet shop and that they sell those small betta bowls. I also realize that you start to built your knowledge about fish keeping.
I remember, soon is your birthday ( let me know when I can congratulate you
) hope you could make a wishlist to get sth bigger for your Spaz and then you can move your betta into the bowl which is bigger than this little glass, ... OK...
Hope this helps