FAQ: Frequently Asked Questions

 


 

Magnifiers

What is the relationship between light and magnification?
Proper lighting is equally important as magnification in achieving a good viewing situation. A magnifying lens would be useless in the dark, so increasing light levels result in better vision. In fact, the better the quality of light used with a magnifying lens, the less power is needed. When less magnification is required, the user has a bigger field of view and working distance under the lens. Therefore, the quality of light should be closely evaluated when choosing an illuminated magnifying lamp.

What is "field of view"?
The field of view is the size of the magnified area under the lens that is in focus. The field of view decreases as power increases. More powerful lenses make small details look big, but less of the total object is visible. There is a trade-off for the viewer who must decide between the size of the field of view and amount of magnification.

What is a "diopter"?
Diopter refers to the curvature of a lens. As the diopter increases, the lens becomes thicker and the curvature greater. As the curvature increases, light rays are redirected to fill a greater portion of the viewer's retina, which makes the object look bigger.

What is power?
Power refers to how much larger an object is made to look through a magnification lens. Power is typically indicated by an "X" such as 2X or 4X.

What is "focal length" and "viewing area"?
Focal length is the distance from the bottom of the lens to what you are looking at. The focal length decreases with the stronger lenses.

Viewing area is the size of the lens you are looking through, which also decreases with increased strength.

Model Series Diopter Focal Length Viewing Area
8MC Series 3 13 inches 5-inch circle
5 8 inches 5-inch circle
11 3.75 inches 3-inch circle
16 2.5 inches 3-inch circle
8MG Series 3 13 inches 5-inch circle
5 8 inches 5-inch circle
11 3.75 inches 3-inch circle
8ML Series 3 13 inches 5-inch circle
5 8 inches 5-inch circle
8MR Series 3 13 inches 4.5 x 6.75 inch
rectangular area
5 8 inches 3 x 5 inch
rectangular area
11 3.75 inches 3-inch circle
16 2.5 inches 3-inch circle

Which is the largest lens Dazor makes and what is the maximum magnification?
The largest glass lens Dazor makes is in the Stretch-View magnifier, which is our standard 3-diopter lens. It has a rectangular lens that is 6.75 inches by 4.25 inches. The highest magnification on this lamp is 4X. However, the higher the magnification, the smaller the field of view is going to be. At the 4X level, the Stretch-View has a 3-inch diameter lens.

Can I purchase optional lenses?
Additional lenses with increasing magnification can be purchased for the magnifiers. They are very easy to change out and are more economical than buying a new magnifier. See magnifier lenses.

What colors do the lamps come in?
The magnifiers vary by model but many come in black, white, almond, and dove gray.

Do I have to put the magnifying lamp together myself?
All of the magnifiers come assembled, except for the light bulbs, which have to be installed. If one purchases a floor stand for the magnifier, it can easily be assembled by tightening one bolt or nut with a small wrench.

How easy is the magnifier to use?
The magnifiers are very easy to use. Simply turn on the light and pull the head towards you. Then put the object you are viewing under the lens.

What is the price range of the magnifiers?
The price depends on many factors such as the magnification power, arm type, light source, and mounting option.


 

Task Lighting

Is fluorescent lighting harmful to my eyes?
Fluorescent light is perfectly safe for your eyes. Sometimes very old fluorescent fixtures or a malfunctioning fixture may cause the fluorescent bulb to produce a noticeable flicker. This flicker may be annoying, but it does not cause harm to your eyes.

Where can I purchase a Dazor product?
We have a network of distributors and dealers nationwide that will be more than happy to answer questions about our product. Simply call our toll free number (800-345-9103) and ask for the dealer in your area or visit our online store.

Are these fixtures portable?
When mounted on a caster floor stand, the fixtures can be rolled very easily within a room or between rooms. If one wanted to use a clamp-on model in two locations, an easy solution is to get an extra clamp for the second location. The lamp can then be carried between the two locations and set in the clamp base attached to the table or desk. Finally, the desk base option allows the lamp to be free standing; however, it is too heavy to carry on a frequent basis (about 27 lbs.).

Where can I get replacement bulbs & tubes for the lights?
Bulbs may be purchased through the Dazor online store, but most of the bulbs can be purchased at hardware stores, home centers, discount stores, or lighting centers in your area.

How long do the bulbs last?
Most fluorescent bulbs last 10,000 hours. Halogen bulbs last about 2,000 hours.

Are there other bulb colors available?
Yes, the fluorescent bulbs come in cool white, daylight, warm white, black light, and full spectrum. See tubes & bulbs.

What is full spectrum lighting?
Full spectrum lighting replicates natural sunlight. This is used for correct color perception where it is imperative to match colors. Proponents of full spectrum lighting say that it reduces glare, increases productivity, operates cooler, and may increase feelings of well being due to the simulation of natural daylight. It is important to note that while some companies market their products as being "full spectrum" lamps, almost any flourescent lamp can become a "full spectrum" lamp by simply using a full spectrum tube or bulb. Dazor offers full spectrum bulbs for use in many of our fixtures, including the magnifiers.

How does the light output of compact fluorescent bulbs compare with incandescent bulbs?
A 13-watt compact fluorescent has comparable light output to a 60-watt incandescent bulb.

An 18-watt compact fluorescent has comparable light output to a 75-watt incandescent bulb.

Fluorescent bulbs operate cooler, use less energy, and last about 5 times longer.

Why is LIGHT important for good vision?
Our ability to see depends upon two factors: (1) proper functioning and focusing of our eyes and, (2) the amount and quality of the light that is reflected from the object back into our eyes. The poorer the lighting, the less light will be reflected from the object back into our eyes. We can't see in the dark – but as the amount and quality of light improves, the better we can see.

I have a TABLE LAMP with a SHADE. Isn't that enough?
In most cases a table lamp with a soft shade is not suited for doing tasks that require seeing small details, such as reading or cross-stitch. Table lamps are designed to look pretty with your furniture and give a soft, warm glow. The shade diffuses the light and prevents more intense, focused light from reaching your task.

Can CEILING FIXTURES provide the proper lighting?
Ceiling Fixtures are designed to give overall illumination to a room. By the time the light travels the distance from the ceiling fixture to table level, it becomes unfocused and too dim for seeing small details. Putting brighter, higher wattage lamps in the ceiling fixtures is not an economical solution because it increases your electric bill!

What is "task lighting"?
Task lighting refers to any light source designed specifically to direct light onto some "task" performed by a person or machine.

What are the primary benefits of task lighting?
Task lighting can:

  • increase productivity
  • improve personal viewing comfort
  • provide greater control of individual lighting levels
  • save energy dollars

How can task lighting increase our productivity?
Do you realize how much more comfortable task lighting makes our jobs? Have you tried it? A recent study by the American Society of Interior Designers found that poor lighting and eyestrain are the most frequent office worker complaints.

We must be comfortable to maintain productivity over the course of a day. There are enough demands and distractions that compete for our energy and concentration. Straining to see should NOT be one of them. Seeing should be effortless and automatic. We spend a great deal of time and money trying to make ourselves more comfortable so that we can be more efficient and productive. Yet frequently, we neglect a simple and inexpensive solution – a task light.

What is the advantage of an adjustable-arm task light?
Personal control. We can adjust the level of light for our individual viewing comfort. Our posture changes during the day. Our tasks vary to some degree. If we have windows, light in the room changes from morning to evening. In response to these changing conditions, we need to be able to adjust the lighting levels directed on our work in order to maintain maximum performance. Task lighting allows us to correctly position the angle of light to eliminate glare and veiling reflections.

Do we need a task light if we have magnification?
Definitely. Magnification is only half of the solution for achieving good vision. Proper lighting is of equal importance. Take an extreme example. How much good would magnification do in the dark? Not much. The benefits derived from visual aids such as magnifiers and prescription glasses are entirely dependent upon the lighting conditions in which they are used. Proper task lighting allows us to get the maximum benefit from a visual aid, and may even allow for reduced magnification. Increasing the amount of light (brightness) directed onto a task will help compensate for small print size or poor contrast. Examples of poor contrast include faded print on white paper, or dark print on a dark background.

Is it true the older we get, the more light we need?
Yes. The older we get, the more light we need to see. Research indicates that people in their 60's need 80% more light for reading than people in their 20's. This increased need for light is due to a number of biological facts in the aging process. For example, the muscle in our eye called the iris, expands and contracts to control the amount of light entering our eye. As with all our muscles, the iris loses some of its flexibility in the aging process, and doesn't open as wide. Therefore, more light is needed to compensate for the reduced ability of the iris to open wide.

How can task lighting save energy and money?
Instead of trying to maintain proper lighting levels on desktops from overhead fixtures, task lights can do a better job while using less energy. A task light using the new 13-watt compact fluorescent lamp will consume far less energy than a typical overhead lighting fixture. A work environment can maintain lower levels of overhead lighting by illuminating desktops with energy-efficient task lights. In addition, maintenance and bulb replacement costs are less with task lighting.

Dazor . . . still unsurpassed in performance and style.