Light space On the HTB060,HTA060, HTA090 and HTCS a space on the ceiling is adapted for small neon light or LED light. On all the other models, the neon light will fit on the ventilation mesh on the back. The 45° angle position of the mesh will let the light come in the cage very deeply. It’s a very important function specifically in the very deep terrariums like HTB180. A space on the roof is available for the neon light starter. We recommend to use a reflector on you neon light it will optimize your lighting 100%. The beige or grey light color of our terrariums will reflect the light very well.It’s an important thing to consider for all the diurnal species.