Join The Conversation With Mishpacha's Weekly Newsletter

Seeing the Light

Shira Yehudit Djalilmand

Are you baffled by lightbulbs? With so many different types, just staring at row upon row of bulbs in the stores can leave your head spinning. Here, we shed some light on the topic

Wednesday, May 17, 2017

 Mishpacha image

EUREKA MOMENT Once upon a time, the wattage of a bulb would tell you how bright it was — but no longer. Wattage tells us how much energy the bulb uses. When there was just one type of lightbulb, that would also automatically reveal the bulb’s brightness. But today, as each type of bulb uses a different amount of energy, wattage is no longer a good guide for brightness

O nce upon a time, choosing a lightbulb was simple. All you had to do was choose between 40, 60, 75, or 100 watts, and the job was done. Today, it’s a different story. Not only are there various types of bulbs available but they also come in a variety of colors, sizes, shapes, strengths, and efficiency levels. And to be honest, most of the guides to lightbulbs are so complicated that you end up even more confused than before.

With the help and advice of our three experts — Aryeh Weintrob, licensed electrician; Leora Gershaw, who runs her own interior design company, Israel Dezign; and Judy Mayer, optometrist — we present Family First’s Guide to Bulbs.

Types of Bulbs

There are four main types of lightbulbs — incandescent, halogen, CFL, and LED.

INCANDESCENT These are your regular old-fashioned lightbulbs, which produce light via a filament that’s heated until it glows. The light emitted is a warm, yellowish glow that many people enjoy. But the average incandescent lightbulb lasts only around a year (with regular use) and isn’t energy efficient. In the US, the Energy Independence and Security Act of 2007 requires higher standards of energy efficiency, and in many other countries similar laws have been enacted. This means that standard incandescent lightbulbs are being phased out and will no longer be produced. Until supplies run out, you can still purchase them — the question is, do you want to?

CFL (COMPACT FLUORESCENT LIGHTS) As their name suggests, CFLs are a more compact version of those long fluorescent tubes. They work in the same way — by producing ultraviolet light that’s converted into visible light via a coating on the inside of the bulb. CFLs are available in a variety of sizes, shapes, and brightnesses and are now a great deal cheaper than when they were first introduced. That makes them a smart buy — especially as, compared to an incandescent bulb, CFLs are 80 percent more efficient, and have an average ten-year life span.

LED (Light Emitting Diode) The new guys on the block are the LED bulbs, and they seem to be taking over. Because the heat produced by the electrical current is absorbed, the bulbs stay cool to the touch. They give off a bright, crisp light, and are the most efficient of all: Compared to incandescent bulbs, LEDs are 90 percent more energy efficient and can last up to 25 years.


The main drawback of LEDs is their high cost, but the price is dropping rapidly, and today LED bulbs can be found in many stores at a competitive price. “Today, both for energy reasons as well as financial reasons, people are choosing LED most often,” says Leora Gershaw. “Bottom line, you get twice as much bang for your buck with an LED versus anything else — and it’s environmentally friendly, too.” One caveat: LEDs are very sensitive, Aryeh warns. If your home experiences frequent problems with the electricity flow, the bulbs may get damaged.

HALOGEN Halogen bulbs work in a similar way to incandescent bulbs, by heating a filament to the point of glowing, but they use less energy to do it and last longer. Compared to incandescent bulbs, they’re 30 percent more energy efficient, and have an average two-year life span. A halogen bulb gives off an instant crisp, bright light.

What Are Your Options?

Now that you know about the types of lightbulbs available, how do you know which one to buy?

Your first clue — think about how and where the lightbulb will be used.

COLOR Regular, old bulbs were simple — you got a nice yellowy light. Today, you can choose not only colored bulbs of any shade, but also the “warmth of the light.” The temperature of light is measured in “kelvins.” Very orange light is low in kelvins; a candle is about 1,500K. Daylight is much colder, often above 5,000K.

When it comes to CFLs and LEDs for household use, most people prefer “warm white” (2,700K), which is closer to the warm, yellowish glow of a regular incandescent bulb. But where the lightbulb will hang can make a difference. In a kitchen or bathroom, you might want a brighter, whiter light, such as “natural white” (3,000K). In an office or work space, the best choice might be the “cool white” (4,000K).

In Israel, Judy Mayer explains, Ministry of Health guidelines specify that lighting in educational institutions must be white and bright. She also warns against using yellow lighting for reading — especially in your bedside reading lamp. “Yellow light changes the color of the page you are reading and forces you to strain your eyes.” This, she explains, can cause enough damage to the eye to necessitate wearing glasses or raise your eyewear prescription. (Excerpted from Family First, Issue 542)

Related Stories

Dual with Words

Yael Schuster

From Jerusalem to Kiryas Joel, many frum women are raising their kids with more than one language. H...

Board Games in the Boardroom

C. Rosenberg

Dice, cards, and game boards in the conference room? According to gaming experts, corporate games ar...

Intense Reactions to Intensive Care

Shifra Ernest

If a loved one is in intensive care, there’s a strong chance he’ll end up suffering from ICU psychos...

Share this page with a friend. Fill in the information below, and we'll email your friend a link to this page on your behalf.

Your name
Your email address
You friend's name
Your friend's email address
Please type the characters you see in the image into the box provided.

Using Our Free Will Effectively
Yonoson Rosenblum The image we carry of ourselves is key
Eytan Kobre The ripple effects of one Jew’s kiddush Sheim Shamayim
Living the High Life
Rabbi Avrohom Neuberger It is exhilarating to matter, to be truly alive
It’s Time for Us to Speak Up
Rabbi Dovid Eliezrie We must speak out proudly for the values of Yiddishkeit
Kiruv Is Not Dead
Rabbi Meir Goldberg Do these sound like uninspired or closed students?
Frosting on the Cake
Rabbi Ron Yitzchok Eisenman “Let’s not let a missing chocolate cake ruin our siyum!”
A Warm Corner in Flatbush
Yosef Zoimen It was a simple shul with a choshuve leader
Out of Control
Jacob L. Freedman “That’s illegal, Dr. Fine. I can’t have a part in this”
Song of Reckoning in the Skulener Court
Riki Goldstein “It’s awe-inspiring to watch the Rebbe sing this song”
“U’teshuvah, U’tefillah, U’tzedakah”
Riki Goldstein Throughout the Yamim Noraim, three words accompany us
The Rebbe Held His Gaze
Riki Goldstein A moment etched in Reb Dovid Werdyger’s memory forever
The Road Taken
Faigy Peritzman In the end it’s clear who really merits true happiness
Sincere Apology
Sarah Chana Radcliffe A heartfelt and complete apology can turn things around
Power Pack of Mercy
Mrs. Shani Mendlowitz The 13 Attributes of Mercy are “an infinite treasure”
The Appraiser: Part II
D. Himy M.S. CCC-SLP, and Zivia Reischer “Eli needs to see people who struggled to achieve”