250000Wm
250000Wm likely refers to a power density. The unit "W" stands for Watts, a unit of power, and "m" is typically a placeholder for a unit of area, often square meters (m²). Therefore, 250000Wm could be interpreted as 250,000 Watts per square meter (250,000 W/m²).
This value represents a significant concentration of energy. In practical terms, such a high power density