Which of the following is considered one of several standard watts for UV bulbs?

The correct choice, 9 watts, aligns with the standard wattage commonly associated with UV bulbs used in nail technology. In the context of UV light applications, such as curing gel nails, the wattage of the bulb can significantly impact the effectiveness of the curing process.

A 9-watt UV bulb is well-established in the industry as it provides an adequate level of UV output to cure gel products effectively without generating excessive heat that could lead to discomfort or damage to the nails. This wattage strikes a balance between efficiency and safety, making it a preferred choice for many nail technicians.

Higher wattages, while possibly providing faster curing times, can also pose risks, such as overheating or damaging the nail structure if not used properly. Therefore, understanding the appropriate wattage helps ensure both optimal results and client safety during nail services.