There are five main rules that must always be considered when designing apartment building lobbies. Each project has its own set of circumstances and goals. And these goals must also coincide with the aesthetics, the inherent building style, furnishings, fixtures, and existing interiors of the building.
Rule Number One: Lighting and Energy Efficiency
Energy efficient lighting is necessary for any building running 24 hours a day. This is one of the main ways a building can reduce its energy costs. There should be no reason to be using lighting other than new compact fluorescent lamps (light bulbs) or fluorescent tubes -- and in rare instances, the use of incandescent and low voltage lighting. The last two burn the most energy/watts and require re-lamping (replacing the light bulbs) more often. A stock of bulbs will also need to be purchased and stored. Compact fluorescent bulbs cost more than most regular incandescent bulbs, but they burn much longer and therefore require less maintenance. This can also be an important factor if there are very high ceilings that require high ladders to get to the fixtures.
Compact fluorescent bulbs can be found in many recessed fixtures or uniquely designed wall sconces. They come in "triple" or "quad" sizes, but remember, the bigger the bulb, the more footcandles (brighter light). They come in 13, 26 or 32 watts, which is very low compared to any 100-watt or higher incandescent bulb.
Compact fluorescent recessed fixtures or surface mounted fixtures that are evenly spaced in a lobby design can provide a broad ambient illumination and sense of spaciousness for a professionally designed space. The fixtures come in a variety of sizes and finish details.