Lighting Sources Incandescent - Incandescent is the most common residential light, where light is produced from a filament that glows when electricity is passed thru it.
Most bulbs are general service, globe or decorative types.
Advantages are low cost, warm pleasing tones. Advantages are better color, more lumens per watt, whiter light, longer life. Disadvantage is higher initial cost. Not available in many lamp wattages at present. Fluorescent - Fluorescent a more energy efficient type of lamp that produces light through the activation of the phosphor coating on the inside of the glass surface.