Are all CFL's created equal-does it matter?

Today I came across a great site that goes into great detail about "green" lighting and the use of energy efficient lights including a popular growing light called a CFL also known as compact fluorescent light. Last year alone 300 million of these little lamps where sold. Should we be excited about this? Well in a sense yes but in another sense no. Just like all natural cleaning and "Green Cleaning" not all are created equal. I like to use this analogy, if something is 99% natural and 1% not natural does it make it natural or not? To find out more about energy saving lamps and lower mercury lighting, visit Environmental Working Group and check out the EWG's Guide to Light Bulbs.