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

July 06, 2012
You're right, different light sources accelerate fading at different rates. It depends on the amount of ultraviolet (UV) light each particular light...
July 06, 2012
I like to come in once a furniture layout is completed and the list of finishes has been selected. It is impossible to do a quality lighting design...
July 06, 2012
The first situation that came to mind is trying to screw in light bulbs while standing on a donkey. The second most challenging situation is when the...
July 06, 2012
You need to become familiar and comfortable with new alternative light sources and light fixtures so that you can make educated decisions on how they...
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...

recent articles

Residential Lighting: How did your work with blue LEDs come about? Shuji Nakamura: From 1979 to 1988,I worked on developing... read full story
Kitchen and bath lighting represents a huge profit center for many showrooms, so for some, membership in the National... read full story
Q: Congratulations on landing the Global Views design partnership. How is it going?  A: I was told my first licensing... read full story
Brandon WeissFounder/PrincipalEvolutionary Home Builders Evolutionary Home Builders, Geneva, IL, focuses on sustainable and... read full story

Webinars

Sponsored by Pure Lighting/Edge Lighting and Spotlite-USA.   Wednesday, Feb. 25, 2-3 p.m. EST Register for this free CEU webinar by clicking here. Webinar Overview:... 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
Sponsored by Access Lighting, Engineered Lighting Products, Ferguson, GM Lighting and Maxim Lighting/ET2.   This webinar has already taken place, but you can view an... read full story