Bromeliads enjoy bright, indirect light.
Guzmanias have a cup (the central well which the flower stalk arises out of) which is how they collect the water they need. Keep that vase about 1/4 of the way full of water & flush it out with fresh water every 1-2 months to avoid any build up of bacteria. If your guzmania is in low light, keep less water in the cup to avoid rot.
Fertilize with all-purpose orchid food, diluted to 1/2 strength, throughout the growing months.