For geckos, key environmental parameters include maintaining the correct temperature gradient, humidity levels, and lighting. The temperature should have a warmer basking area and a more relaxed zone, mimicking their natural habitat. Humidity levels must be appropriate for their species, as some require more moisture than others. Proper UVB lighting is essential for their overall health, aiding in vitamin D3 synthesis. Cleanliness and ventilation of the habitat are also crucial. Regular monitoring and adjustments are necessary to keep these parameters within the ideal range for the gecko's well-being.