UV and Light Chart
The UV & Light Intensity Chart displays the readings of an AcuRite Atlas outdoor UV (ultraviolet) and Light Intensity Sensor, along with reading records for each type of reading.
The chart displays three individual charts.
UV Index - the UV index readings received from the UV sensor.
Light Intensity - the lux reading measurements received from the light intensity sensor.
Measured Light - the amount of time the light intensity readings, for the time period being viewed, have been at 1,000 lux or greater. This reading is a calculated reading generated by My AcuRite.
Hover over a reading data point to display its detailed reading information.
About the UV Index
Short for Ultraviolet, UV is a type of radiation that is primarily produced by the sun. The UV Index level is the measurement of the strength of the sun’s UV rays. The UV Index is affected by a number of factors including the time of day, time of year, cloud cover, altitude, how close you are to the equator, scattering and reflection.
By knowing and monitoring UV in your actual location, you can take better precautions to protect your health and plan your day with confidence™.
UV Index Scale
The UV Index Scale provides important information to help you plan your outdoor activities in ways that prevent overexposure to the sun's rays. It was designed by the National Weather Service (NWS) and the Environmental Protection Agency (EPA). The higher the number, the stronger the rays that equal higher risk.
Low - displayed when the UV index reading is 2 or less.
Moderate - displayed when the UV index reading is 3 to 5
High - displayed when the UV index reading is 6 to 7.
Very High - displayed when the UV index reading is equal to 8 to 10.
Extreme - displayed when the UV index reading is 11 or higher.
About Light Intensity
The Atlas outdoor Light Intensity Sensor detects and measures the intensity of outdoor sunlight or illumination at its installation location. Measurements are taken in the form of a lux, which is the amount of light output in a given area.
My AcuRite also generates a Measured Light calculated reading - which is defined as the amount of time that the light intensity readings have been at 1,000 lux or greater. By monitoring and understanding measured light hours at your actual location, you can improve your garden growth and health, and even better plan your outdoor activities.
The light intensity scale is based on the last received lux reading as defined below.
Dark/Night - displayed when the light intensity reading is equal to 0 to 500 lux.
Low Light - displayed when the light intensity is equal to 501 to 5,380 lux.
Overcast/Shade - displayed a when the light intensity reading is equal to 5,381 to 21,520 lux.
Daylight - displayed when the light intensity reading is equal to 21,521 to 43,050 lux.
Direct Sun - displayed when the light intensity reading is equal to 43,051 lux or greater.
Reading records
My AcuRite display various reading records for the time period selected.
UV Index High - the highest recorded reading for the time period selected, including the date and time of the reading.
Light Intensity High - the highest recorded reading for the time period selected, including the date and time of the reading.
Light Intensity Low - the lowest recorded light intensity for the time period selected, includes the date and time of the reading.
Measured Light Total - the total accumulation of light measured for the time period selected.