120 refers to the degree of angle of the light fixture. A 120° angle is a wide beam angle for light bulbs and can cover an entire room if the ceiling is high enough.

The objective lens is the lower lens nearest to the specimen which enlarges the specimen and is also referred to as the primary lens while the eyepiece is the top ocular lens that lies nearest to the viewer’s eye and also known as secondary lens. They offer two-dimensional visual information.

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We have discussed light fixtures, but the bulbs can also vary significantly. The most common bulb that everyone knows of is the pear-shaped type A bulb; when you have an idea, this is the bulb that shows up above your head.

Your choice of beam angle depends on the lighting application. The two most common categorizations of lighting styles and, thus, beam angle choices are residential and commercial buildings.

Compound microscopes are built using a compound lens system where the primary magnification is provided by the objective lens, which is then compounded (multiplied) by the ocular lens (eyepiece).

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RC Lighting has a fantastic selection of lighting solutions with a wide range of beam angles. Some of our most popular lighting solutions are Outdoor LED Step Lights, LED Underwater Fountain Lights, LED Recessed Lighting, and Commercial LED Track Lighting.

Beam angles for bulbs are calculated in a controlled environment with exact instruments. General consumers don’t need to calculate the angles; they can look at your light bulb’s packaging or the manufacturer’s website. This section is purely informational to help you better understand the right beam angle.

Arm: It is a strong and curved curvature used to hold the microscope while moving them from one place to another and also functions to connect the tube with the base of the microscope.

Now that you understand the importance of light beams and the difference between narrower and wider beam angles, we can choose criteria. To select the best beam angle for your building, consider Five Factors.

Eyepiece/ Ocular lens: It is the lens housed at the top of the body tube through which one can observe the magnified image of the specimen on the slide. The ocular lens has a 10X magnification power.

The Beam Angle helps determine the light coverage area; a higher angle equals more area coverage and vice versa. To fully cover the floor of a 40×40-square-foot room, you will require one 60° light placed in the center of a 34 ft. high ceiling or two 60° lights placed 10 ft. from a 17 ft. high ceiling center.

Coarse adjustment knob: A large knob with a smaller knob in the middle can be found on each side of the microscope, close to the base. This large knob raises or lowers the stage and is used to concentrate an object closely. The coarse-adjustment knob should only be utilized with low-power or scanning objective lenses.

The compound microscope is widely thought to have been created by Zacharias Janssen, using collapsing tubes that produced magnifications up to 9X. However, the majority of experts believe that his father, Hans, must have had a significant hand in the construction of the instrument.

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Head/ Body Tube: It forms the top section of the microscope which holds prisms and eyepiece tubes. The presence of a single head which has only one eyepiece is known as monocular head while the double head bears two eyepieces.

Beam angle can be a daunting metric, but it’s a simple concept once you understand it. Use wide beam angles when you need a space to be well-lit, and use narrow beam angles to emphasize an area. Of course, don’t be afraid to use a combination of beam angles to achieve your ideal lighting environment.

The beam angle measures the light spread from a source, such as a light bulb. Broader beam angles result in more spread-out light, but the light is also less intense. Vice versa, narrower angles will have less spread by the higher light intensity.

So, here is a detailed guide to help you learn all about Beam Angles in Lighting and choose the perfect beam Angle for your needs.

Illuminator: The condenser is illuminated by an integrated halogen lamp, usually located on the base and features a dial for adjusting the brightness on one side. However, earlier microscopes featured the mirror which acted as an illuminator by reflecting the natural light into the base of the microscope.

The beam spread here is 50% of the total light output; any light outside this concentrated center is called “spill light” or “beam field.”

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Light fixtures are the next most crucial factor in beam angle selection. A light fixture is the base of a light, typically attached to a wall or ceiling. It can also have light sources (Bulbs or LEDs).

Typically, houses and apartments will use a combination of lighting styles. Using a variety of lighting units with varying beam angles creates visual appeal. Mixing and matching can also allow for accent and task lights.

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This light intensity is typically measured in Lumens. Lumens per square meter are called “lux,” and Lumens per square foot are called “foot candles.” The total lumens needed to light up a room change depending on the type of light and room size.

Light intensity decreases the further you are from the light source; higher ceilings will result in weak lighting at the floor level.

Commercial buildings are a very different category from residential buildings. After all, there isn’t just one type of commercial building. So, for ease of understanding, we have subdivided commercial buildings into the following.

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Residential buildings focus on uniform illumination on a room-by-room basis. So a wider beam angle light in the center of a room is usually enough.

Restaurants are an outlier in the commercial space since they focus on aesthetics and mood lighting. Since many restaurants only open for business from early evening to late night, they avoid a brightly lit environment.

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Thus, wide flood beam angles are preferred in office spaces, typically around 60°, with narrower beam angles only used as task lighting.

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Residential buildings, such as houses or apartments, have lower ceilings, usually 10 ft. or less. Thus, such buildings require a wide-angled light for complete room coverage.

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Scanning objective lens(4X): The smallest magnification offered by any objective lens is that of a scanning objective lens. A typical magnification for scanning objectives is 4x. These roughly provide viewers with enough magnification for a good overview of the slide.

There are two methods of referencing a beam angle. One uses angles in degrees, like 10°,  60°, 120°, etc. Another uses terminology like narrow beam angle, spot, wide, wider angle, etc.

Low power objective lens(10X): One of the best lenses for viewing and examining glass slide samples is the low power objective lens since it has a higher magnification power than the scanning objective lens.

The terminology and standards for beam angle are not universal, but the NEMA classification is the most commonly used one. NEMA is the National Electrical Manufacturers Association, the largest association of electrical equipment manufacturers.

Commercial or Industrial buildings, such as factories and warehouses, have high ceilings, usually over 25 feet. These buildings require strong, narrow beam angles and multiple light fixtures for full area coverage.

Thus, it is clearly evident that the increase in focal length of both eyepiece and objective result in a decrease of magnification power of the microscope.

Retail stores have one goal for lighting: showcasing their products in the most flattering light. The ideal flattering light requires shadows and glares to be minimized. This requires intense ambient lighting, which covers the entire store, so a narrow beam angle and multiple light bulbs are preferred.

Since warehouses have high ceilings, they require narrower beam angles that maintain their intensity when reaching the floor. The exact number differs based on ceiling height.

Diopter adjustment: It helps to adjust the focus on one eyepiece while using two eyepiece lenses to gaze through a microscope to account for the disparity in vision between two eyes.

For instance, when the objective lens can magnify by 40 folds and the ocular by 10 times, the specimen will be overall magnified by 400X.

Type A bulbs have no direction, so we put reflectors on them to give them direction. Modern light bulbs, primarily LED ones, come on PAR, BR, and MR reflector casings.

A narrow beam angle is a blub with a beam angle of less than 30°. However, there are even finer categories of beam angle, such as Spot angle or Narrower beam angle.

Oil immersion objective lens(100X): These are present in microscopes with four objectives which have 100X magnifying power. This requires the addition of a drop of immersion oil on the sample.

When it comes to lighting, there are two main types: symmetric and asymmetric. Symmetric lighting is when the light is distributed evenly across the subject, while asymmetric is when one side of the subject is brighter than the other. Which one is better? Let’s take a closer look.

Fine adjustment knob: These are small knobs on each side of the microscope which is used to focus an object precisely. Only the fine-adjustment knob should be used for all focusing when using the high-power objective (40X) lens.

As discussed previously, residential buildings have lower ceilings and fewer square feet of area. We can use the same beam angles for houses and apartments, as the two are very similar from a lighting perspective.

Living rooms are larger than most other rooms in a house and usually have an attached kitchen or dining area. A wider beam angle, anything above 60°, is recommended for coverage of a living room. Living rooms also don’t require as much light, so they can make do with fewer light units.

For example, jewelry stores use a narrow beam angle under 10 ° inside display cases 10°. Meanwhile, clothing store lighting uses a 30° or wider beam angle for mannequins.

You need narrower light angles in other house areas, like staircases or walk-in closets; 25 ° is a standard angle for a 9-10 ft. ceiling.

In most houses, a medium beam angle, between 40° and 60°, is sufficient to light up a room properly. However, the actual beam angle can vary slightly depending on the above-mentioned five factors.

Lighting is one of the most important things in a hotel or other accommodation facility. Therefore, the first step to providing quality services to your customers is to ensure your building has the correct lighting. The hospitality industry is highly competitive, which is why pairing the right hotel light fixtures with the correct hotel lighting ideas plays an essential role.

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Office spaces will have multiple workers spread out, and poor lighting can cause some workers to face harsh light glares while others end up in the shadows. Also, employees working in front of a computer screen can strain their eyes if the surrounding light is too low.

Here is a complete, detailed guide on beam angle in lighting. Hopefully, this article has informed you of the basics, and you will use the information from this article when selecting lighting for your building.

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Magnifications for the various objectives on compound microscopes typically range from 4x to 100x. Commonly used eyepieces are 10x, giving in total magnifications of 40x to 1000x.

Iris diaphragm: It lies immediately underneath the stage which controls the contrast by adjusting the amount of light that enters the condenser.

Condenser: It is situated beneath the iris diaphragm. It functions to converge the light coming from the light source and focus it onto the specimen

However, commercial buildings such as restaurants or factories will focus on efficiently illuminating a large floor area. They require medium—to narrow-angled lights spread over a large ceiling area. Restaurants, in particular, also focus on mood and accent lighting.

High power objective lens(40X): This will be the longest objective lens if the microscope has three objectives only. It is employed to see an object in much more detail. The 40X high-power objective lens magnifies objects 40 times.

However, if you find the beam angle selection process too tedious, you can rely on our experts at RC Lighting to help guide you. We offer several indoor and outdoor lighting solutions for residential and commercial buildings.

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Beam Angle is an easy metric to help you optimize light coverage in your house or building. Any modern-day lighting work involves beam angle and light spread calculations. The beam angle is often used in lighting work, but few know of the details and its usefulness.

Mechanical Stage Knob: These knobs are two in number where the former moves the slide from side to side while the later helps in back and forth movement.

Stage:  It is a platform where sample specimens are usually mounted onto a glass slide for observation/ This comes in a variety of shapes including rectangular, square or circular design. The most compound microscopes include an adjustable mechanical stage height.

Base/ Foot: The term in itself defines it to be the bottom component of a microscope that acts as a prop to support the entire weight of the microscope. This facilitates placing it on a table or bench.

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Commonly, the specimen or object to be examined is mounted on a transparent glass slide and positioned on the specimen stage between the condenser and objective lenses. A beam of visible light from the base is focused on the specimen by a condenser lens. The light emitted by the specimen is captured by the objective lens, which magnifies it inside the body tube to create the primary image. This image is once more magnified by the ocular lens or eyepiece. If a higher magnification is required, the compound microscope’s nosepiece is rotated after low power focusing in order to align the higher magnification objective with the lighted portion of the slide.

Objective Lenses: Commonly three to four objective lenses with magnification powers of 4X,10X, 40X and 100X are available in compound microscopes.

Inclination joint: This facilitates tilting the microscope back for more comfortable viewing. It is a region where a pin can be found at the point where the microscope arm attaches to the base of it.

Light fixtures can change a light bulb’s beam angle. A hanging pendant typically decreases the angle, whereas a recessed light fixture may increase it.

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Nose piece: It is also known as the revolving turret which houses three to five objective lenses and is located below the head of the microscope. It can rotate in either direction to lock the objective lens over the stage aperture.