Ask Randall

Randall Whitehead lighting designer
Randall Whitehead, IALD

Randall Whitehead, IALD, is a professional lighting designer and author. His books include "Residential Lighting, A Practical Guide." Whitehead has worked on projects worldwide, appeared on the Discovery Channel, HGTV and CNN, and he is regular guest on Martha Stewart Living Radio. Visit his website www.randallwhitehead.com for more information on books, upcoming seminars and the latest lighting trends.

Recent Posts

June 12, 2012
There are a number of factors that affect lamp life. First off, you are right about “average rated lamp life.” This means that half the lamps burn...
June 12, 2012
There isn’t a hard-and-fast rule about when to use clear or frosted flame-tip lamps (B10 is the industry name for them). It depends on the type of...
May 18, 2012
You are right on all counts with incandescent light, but the same is not true with CFLs and LEDs. Neither of these sources gets warmer in color when...
May 18, 2012
Halogens are twice as hot as standard incandescent lamps. If a table lamp is UL-rated for 75W, it is referring to a standard household bulb. You can’...
April 12, 2012
That depends on what formula is used. Some use 24 hours a day, seven days a week, while others use 12 hours a day or even six hours a day (based on...
April 12, 2012
LED lamps and components will continue to improve in efficacy, CRI and output over time, long before our original purchases have burned out. If...
April 12, 2012
LEDs do produce heat. That is why there is so much metal in the lamps and fixtures to act as heat sinks. The main difference is that they do not...
April 12, 2012
What is the room that you are lighting being used for? How is the furniture laid out? Instead of just doing a grid of recessed fixtures, my...
March 19, 2012
Yes, you do have a bit of the situation there. But fear not, there is an answer at hand … actually, four answers: 1. Look for a linear fixture that...
March 19, 2012
First off, I’ll provide a guideline: The bottom of the fixture should be 32 to 36 inches above the tabletop. Now that I’ve told you that rule, I’m...

recent articles

Q: What are the biggest differences between Canadian and American lighting markets? A: I’ve always looked on the North... read full story
Residential Lighting: How did your book come about? Hilliard MacBeth: Fifteen years ago, I started to notice people changing... read full story
As many in the home furnishings industry celebrated a slight but meaningful uptick in sales over the previous year, news... read full story
In March 2015, the American Lighting Assn. (ALA) will launch the ALA Newsfeed, a free customizable member option.  The... read full story

Webinars

Sponsored by Emerson, Ferguson and Pure Lighting/Edge Lighting.   Wednesday, April 8, 2-3 p.m. EDT Register for this free CEU webinar by clicking here. Webinar Overview:... read full story
Sponsored by Pure Lighting/Edge Lighting and Spotlite-USA.   This live webinar has already taken place, but you can still view the presentation on demand by clicking... read full story
Sponsored by Access Lighting, Engineered Lighting Products, Langlais Group Inc., LTF and Pure Lighting/Edge Lighting.   This webinar has already taken place, but you can... read full story