This is what i call a "Cactarium".
It used to be an "Aquarium".
In it are about 20 different kinds of Cactae and Succulents.
Lighting has been enhanced so there's enough light for the Cactae to flourish,and behind the pieces of wood in the back corners there are vents that allow for fresh air to be inserted into the habitat so the plants receive enough carbon dioxide, and humidity doesn't rise too high.
This one is in the teacher's lounge of the middle school i work at as a volunteer but it would also work very well to brighten up an office, bring colour to your reception area, and even replace that hard-to-manage aquarium in your living room.
The benefits of a Cactarium are numerous. Its obvious beauty aside, it brings light and colour into your environment, and is very easy to maintain; water and a little nutrition every two months, replace lights every two years, and every once in a while you need to thin out a little, or replace individual Cactae as they become too big, but it takes years for it to fill up and grow that much.
This Cactarium has been built using an existing aquarium and the total cost of rebuilding and planting was about €250 (+- $350) The dimensions are 160cm wide, 60cm deep and 60cm high. The lighting is done by three 2700K 54W TL5's, and one 6500K 54W TL5. Ventilation by two 12V Ultra silent 92mm PC Fans, built into 11cm pvc piping which is covered with a 125mm pvc cap to prevent water from reaching the fans, then covered with pvc glue and sand to hide them. The 80mm holes they were built on were already in the bottom of the aquarium, most likely they were there to make cleaning out the aquarium easier.
The reflectors for the lights were custom made by me from .5mm aluminium plate.
All in all this took me about 20 hours of research on the WWW, and about 15 hours for the work itself.