Use Compact Fluorescent Lamp, because...

(By the way, a compact fluorescent lamp (CFL), also known as a compact fluorescent light bulb (or less commonly as a compact fluorescent tube [CFT]) is a type of fluorescent lamp. Many CFLs are designed to replace an incandescent lamp and can fit in the existing light fixtures formerly used for incandescents.)



...it has low-energy consumption(Up to 80% energy savings over standard incandescent bulbs).



...it has long lifespan(Modern CFLs typically have a lifespan of between 6,000 and 15,000 hours, whereas incandescent lamps are usually manufactured to have a lifespan of 750 hours or 1,000 hours).



...it is safe(Most are equipped with fuse and encased in flame-retardant plastics).



...it is cost-saving(In addition to the above savings on energy costs, the average life of a CFL is between 8 and 15 times that of incandescents.[19] While the purchase price of a CFL is typically 3 to 10 times greater than that of an equivalent incandescent lamp, the extended lifetime (less lamps to replace and reduced labor) and lower energy use will compensate for the higher initial cost in many applications).



...and it comes in different shapes and sizes(and colors, perhaps).



(A Black CFL)