Lighting

Most modern buildings don’t take full advantage of daylight. Here, in the Plaza at PPL Center, a dramatic eight-story central glass atrium brings natural light deep into the core of the building, while extensive perimeter glazing provides abundant daylight.

Dimmable compact fluorescents are available, they are usually made with “cold cathode” technology. You can find dimmable bulbs here on Amazon. There’s a 12 pack available here, and a dimmable compact fluorescent spotlight here.
1000 Bulbs also sells a wide range of dimmable compact fluorescent bulbs

Who knew that compact fluorescents came in colored bulbs too? The yellow ones can be used as bug lights.
They also come in other colors too.
Available from: Save on Lighting ($9-$11)

CFLs provide the same amount of light (lumens) as standard
incandescent bulbs, but have lower wattage ratings.
A standard incandescent light is very inefficient because much of the energy
it uses is turned into heat instead of light. A compact fluorescent bulb turns
more of its energy into light and less into heat. It uses 75 percent less [...]

The equivalent of 60W incandescent bulb, with the same warm glow, uses only 11W. Available from: Gaiam.Com ($8) or for around $2 on Ebay.

Three-way compact fluorescents are now available. This bulb offers the warm glow of an incandescent in three different wattages: 11, 22 and 33 watts, comparable to 40, 75 and 115 watt of a standard bulb. Available from: Amazon ($11.90)

A 15W dimmable floodlight compact fluorescent. Works with standard dimmers. Available from: Amazon for about $15.

Cold Cathode Fluorescent lights draw very little power for the
light they deliver. CCFs produce up to 80 lumens per watt. Halogen lights typically
produce 15-18 lumens per watt, and the most efficient white LEDs on the market
produce 23 lumens per watt.
CCF lights provide up to 25,000 hours of service life and unlimited
starts. The [...]