Ask Randall

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 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...

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As technology progresses, so should your business. Many retailers are looking for portable solutions to allow for accessing... read full story
Q:  What’s the size and scope of your collection for Elegant Lighting?A: I’ve designed 40 pieces for them, so it’s... read full story
Residential Lighting: What hats do you wear today that designers didn’t wear in the past? Lisa Kahn: I find that I wear a... read full story
Sponsored by Crypton Home Fabric, this year’s High Point Style Spotters are back to scour the fall market for the latest new... read full story


Wednesday, December 7, 2016 Sponsored by Legrand, Lightovation and Rev-A-Shelf. Register for this webinar here: read full story
This webinar has already taken place, but you can register and watch in on demand here. Sponsored by Legrand. Webinar Overview:Learning units:AIA/CES LU (HSW) 1.0... read full story
This webinar has already taken place, but you can still watch it on demand by registering here. Sponsored by Emerson and Legrand. Webinar Overview: Learning units:AIA/... read full story
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