1. "3-6W": This represents a range of power. It indicates that the power output of the device or component can vary between 3 watts and 6 watts. This means that the device can provide a power output ranging from 3 watts to 6 watts under normal operation.

2. "3/6W": This represents a fraction or ratio of power. Typically, this notation is used to indicate that the device has two power modes or options under specific conditions. In this case, the device can be set to operate at either 3 watts or 6 watts, depending on the device settings or the required power demand.

Therefore, while both identifiers are related to power, they have slightly different meanings. "3-6W" indicates a range, whereas "3/6W" represents selectable power modes or options. The appropriate usage of these identifiers depends on the context and the specific device or system being referred to.