lumenórával

The term "lumenórával" is a Hungarian word referring to a unit of measurement for illuminance over time. It combines "lumen," the SI unit of luminous flux, with "óra," the Hungarian word for hour. Essentially, it quantifies the total amount of light received by a surface over a specific duration. While not a standard SI unit, it is used in practical applications, particularly in contexts where the cumulative effect of light exposure is important.

Think of it this way: a single lumen measures the brightness of a light source. A lumen-hour measures how much of that brightness has been "delivered" or received over a period of one hour. For example, a light source emitting 100 lumens for 5 hours would deliver 500 lumen-hours of light. This concept is useful in fields like lighting design, agriculture (for plant growth), and even in some scientific experiments where the cumulative light dose is a critical factor. It allows for the comparison of different lighting scenarios based not just on their intensity, but also on how long that intensity is maintained.