Editorial:  Interesting idea. Not sure how helpful it is… From a pure web development standpoint, this calculator is beautiful, elegant, and simple to use.  It uses slide bars to allow…

Excerpt from: http://allthingsd.com/20120117/picking-the-brightest-most-efficient-bulb/?refcat=reviews For years, we’ve measured light bulbs by watts, which indicate how much energy a bulb uses. But bulb brightness is measured in lumens. Many of the new…