John Jackiewicz's Article in Business

430 HID Light Bulbs
HID light bulbs (or HID light lamps as people in the lighting industry refer to them) are defined as high intensity discharge lights, meaning that they produce more light than a regular light bulb.
Posted on Mar-11-2010

715 LED Lighting
LED light bulbs have been being developed since around 2004, and started becoming more popular around 2007-2008. LED lighting itself was truly invented though around 1961 when designers applied for a patent for this type of light technology
Posted on Mar-10-2010