
When choosing an exterior paint, it is important to consider its light reflective value (LRV). LRV is a measurement system that indicates the percentage of light reflected or absorbed by a paint colour. It is measured on a scale from 0% (absolute black) to 100% (pure white). A lower LRV indicates darker colours that absorb more light, while a higher LRV represents lighter colours that reflect more light. The lighting in the room and the direction it faces are also important factors to consider, as north-facing rooms will let in less light, and south-facing rooms will have more intense light. Additionally, the texture of the exterior walls can create shadows and change the perception of colours. Understanding LRV can help enhance the aesthetics of your space, improve energy efficiency, and reduce costs. It is also important to note that reflective paints may not be suitable for cold climates as they can result in higher energy bills.
| Characteristics | Values |
|---|---|
| LRV range | 0-40 (low), 41-80 (medium), 80+ (high) |
| LRV and lighting | A higher LRV reflects more light, a lower LRV absorbs more light |
| LRV and room size | Use lower LRV for large rooms, higher LRV for small rooms |
| LRV and room orientation | North-facing rooms get less light, so use lighter colours; south-facing rooms get more light, so use darker colours |
| LRV and room furnishings | Use lower LRV if furnishings are bright or the area reflects lots of colours |
| LRV and room atmosphere | Use lower LRV for a darker, more intimate feel; use higher LRV for a lighter, more daytime feel |
| LRV and exterior walls | Whites with higher LRV are ideal for better energy efficiency and cooler temperatures in warm climates |
| LRV and exterior lighting | A lower LRV may need more exterior lighting |
| LRV and textures | Higher LRV shows off textures, lower LRV masks them |
| LRV and glare | An LRV higher than 85 may be too bright |
| LRV and climate | In cooler climates, use a lower LRV to absorb light and heat; in warmer climates, use a higher LRV to reflect light and heat |
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What You'll Learn
- Lighter colours have a higher LRV and reflect more light, while darker colours have a lower LRV and absorb more light
- The amount of natural light an exterior surface receives will impact the LRV of the paint
- A higher LRV can help bounce daylight into a building's rooms, saving energy and costs
- The orientation of a building impacts the amount of light a room receives, influencing the LRV of paint
- The texture of exterior walls creates shadows and changes how colours are perceived

Lighter colours have a higher LRV and reflect more light, while darker colours have a lower LRV and absorb more light
LRV, or Light Reflectance Value, is a crucial consideration when selecting paint for your home, especially its fixed elements. It refers to how light or dark a paint colour is and how much light a paint colour reflects. The darker the paint colour, the lower the LRV number, and the more light it absorbs. The lighter the paint colour, the higher the LRV number, and the more light it reflects.
LRV is measured on a scale from 0% (absolute black) to 100% (perfectly reflective white). A low LRV is in the 0–40 range, while a medium LRV is 41–80. A high LRV is 80 and above. A lower LRV means the paint colour absorbs more light than it reflects. For example, a dark blue exterior paint will appear lighter when hit with direct sunlight and will look almost navy black when not in the sun.
When choosing an exterior paint colour, a white exterior with a high LRV will be more reflective, keeping your home cooler in warm climates. A darker colour with a lower LRV will absorb more light and transfer it as heat into indoor spaces, making it ideal for cooler climates.
LRV is also important when considering the lighting in a room. A north-facing room will let in less light, so a lighter paint colour with a higher LRV will appear dimmer. A south-facing window will bring more intense light, so a light colour with a high LRV can make a room look washed out.
The LRV of a paint colour will determine how much light is reflected and absorbed, impacting the look and feel of your home, as well as energy efficiency.
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The amount of natural light an exterior surface receives will impact the LRV of the paint
When choosing an exterior paint, it is important to consider the amount of natural light the surface will receive. For example, a white exterior with a high LRV will be more reflective, whereas a darker colour with a lower LRV will absorb more light. A south-facing surface will receive more intense light, so dark colours will appear brighter, and light colours may look washed out. A north-facing surface will let in less light, so darker paints will appear darker, and light paints will appear dimmer.
The climate should also be considered when choosing an exterior paint. In a warmer climate, a lighter colour with a higher LRV will reflect light and keep the building cooler. In a cooler climate, a darker colour with a lower LRV will absorb more light and heat, helping to keep the building warmer.
It is also worth noting that the texture of the exterior surface will impact the choice of paint. High LRV colours will show off texture, while darker colours with low LRV will mask it.
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A higher LRV can help bounce daylight into a building's rooms, saving energy and costs
When choosing a paint colour, it is important to consider the light reflective value (LRV) of the paint, especially for exterior walls. LRV refers to how light or dark a paint colour is and how much light it reflects. The higher the LRV, the lighter the colour, and the more light it reflects.
A higher LRV can be beneficial for bouncing daylight into a building's rooms, saving energy and costs. This is because lighter colours reflect more light, creating a brighter and more expansive space. This can reduce the need for artificial lighting, as well as providing a visually stimulating and productive environment for occupants. In commercial spaces, this can mean less overhead and task lighting, resulting in lower heating bills during winter.
When selecting a paint colour with a high LRV, it is important to consider the amount of direct sunlight the building receives. A home with ample natural light will benefit from a higher LRV, as it will appear lighter and brighter. However, a darker paint with a lower LRV may be more suitable for a home with less direct sunlight, as it can help create a warmer environment.
Additionally, the positioning of windows and the use of skylights can also impact the effectiveness of high LRV paint in bouncing daylight into a building. A well-designed fenestration system, incorporating both daylight windows and view windows, can maximize the penetration of daylight into the building.
It is worth noting that while a high LRV can enhance the lighting in a space, it is important to consider the desired atmosphere. Lighter colours with a high LRV may be ideal for creating a bright and airy ambience, but for a more intimate or sophisticated feel, a lower LRV might be preferred.
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The orientation of a building impacts the amount of light a room receives, influencing the LRV of paint
The orientation of a building is a crucial factor in architectural design, impacting energy efficiency, natural lighting, and the overall comfort of the occupants. By understanding the impact of building orientation on natural lighting, architects can make informed decisions about paint selection, specifically considering the Light Reflectance Value (LRV) of the paint.
LRV, also known as Light Reflective Value, is a measure of how light or dark a paint colour is and how much light it reflects. Paint with a higher LRV will reflect more light, making a room appear brighter and more spacious. Conversely, paint with a lower LRV will absorb more light, resulting in a darker and more intimate atmosphere.
When it comes to the orientation of a building, north-facing rooms generally receive less direct sunlight, resulting in less natural lighting. In this case, selecting a paint colour with a higher LRV can help maximise the available light and create a brighter space. On the other hand, south-facing rooms benefit from an abundance of natural light due to their orientation. Here, a lower LRV paint can be chosen to create a more balanced and soothing environment.
Additionally, the orientation of a building can impact the amount of heat received from the sun. For example, east-facing walls receive morning sunlight, while west-facing walls are bathed in afternoon sunlight. In colder climates, orienting a building to the south can maximise solar gain and natural heating. Conversely, in warmer climates, a north-facing orientation can help minimise heat gain and reduce cooling costs.
It is worth noting that the impact of building orientation on lighting can be influenced by other factors such as window sizes, textures on exterior walls, and the presence of artificial lighting. Therefore, it is essential to consider the interplay between orientation, lighting, and paint selection to create the desired atmosphere and comfort level in a room.
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The texture of exterior walls creates shadows and changes how colours are perceived
When choosing an exterior paint colour, it is important to understand the light reflective value (LRV) of the paint. LRV refers to how light or dark a paint colour is and how much light it reflects. The darker the paint colour, the lower the LRV number, meaning it reflects less light. Conversely, lighter paint colours have a higher LRV number and reflect more light.
The texture of exterior walls can create shadows and change how colours are perceived. A lot of texture on exterior walls will impact the way light reflects off the paint, altering the way the colour is perceived. Paint with a high LRV will show off the texture of the wall, whereas darker colours with a low LRV will mask the texture. For example, a white paint with a high LRV will reflect the colours around it and appear brighter, whereas a dark blue exterior paint will appear lighter when hit with direct sunlight and almost navy black when not in the sun.
The amount of direct sunlight an exterior wall receives will also impact the way the colour is perceived. A wall with high exposure to direct sunlight will benefit from a high LRV paint, which will reflect more light and maintain a cooler temperature. Conversely, a wall with less direct sunlight may need a paint with a lower LRV to absorb more light and create a warmer space.
It is also important to consider the desired effect of the paint colour. Lighter colours with a high LRV will make a space appear larger, while darker colours with a low LRV will make a space seem smaller and more intimate. The arrangement of colours can also impact the perception of a space, for example, painting two opposing side walls a darker colour will make a space appear narrower and improve the proportions of rooms with unbalanced dimensions.
To summarise, when choosing an exterior paint, it is crucial to consider the texture of the wall, the amount of direct sunlight, and the desired effect on the space. By understanding the LRV of the paint and the impact of texture and lighting, you can select a colour that will create the desired atmosphere and visual effect.
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Frequently asked questions
LRV stands for Light Reflectance Value, which refers to how light or dark a paint colour is and how much light a paint colour reflects. The darker the paint colour, the lower the LRV number. The lighter the paint colour, the higher the LRV number.
The LRV of a paint colour will determine how much light is reflected and absorbed. A higher LRV is lighter and will reflect more light, while a lower LRV is darker and will absorb more light. You should consider the amount of natural light your exterior receives, as well as the lighting you use.
A high LRV can help create a lighting plan that bounces daylight deeper into a building's rooms, saving energy and money in the long term. A high LRV is ideal for warmer climates as it reflects light and keeps your home cooler.
A low LRV is ideal for cooler climates as it absorbs more light and heat, keeping your home warmer. A low LRV is also useful for creating a darker, more sophisticated look.
Every major paint manufacturer lists every colour's LRV on the back of their sample paint chips. You can also check their websites if you only remember the name or the paint can has been covered over.




























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