lumen CFL/LED bulbs- LED Raw Material !!!
Know your watts and lumens (light output)
We are accustomed to choosing bulbs by how much electricity they use. For example, a 40-watt incandescent bulb is on the dim side and uses less power, while a 100-watt bulb is bright and uses a lot of juice. CFL bulbs have much lower wattage numbers than their incandescent cousins, but don't let that fool you. CFLs provide much more light at a fraction of the wattage of traditional bulbs. Because of this, CFLs are often categorized by lumens. Energy efficient compact fluorescent lamps (CFLs) offer great opportunities for savings. Low Lumen CFLS are an energy efficient substitute for 40-60 watt incandescent bulbs.
5 Easy Steps to Buying a Energy Saving Light Bulb