1.0Tour ELhttp://www.edisontc.org/lightingadminhttp://www.edisontc.org/lighting/author/admin/rich600338<blockquote class="wp-embedded-content" data-secret="3yUa6Pcls8"><a href="http://www.edisontc.org/lighting/course/">Course</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="http://www.edisontc.org/lighting/course/embed/#?secret=3yUa6Pcls8" width="600" height="338" title="“Course” — Tour EL" data-secret="3yUa6Pcls8" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> https://www.edisontc.org/lighting/files/2016/02/TourELtitleCrpBig.jpg835399We have categorized all forms of electric light into 13 categories. The Edison Tech Center spent 3 years researching and gathering information on each form of light and has condensed the material into pages on our main website and short videos hosted by lighting expert and collector Rick DeLair. Follow along as we explore all … Continue reading