Which wattage of UV bulbs is NOT available?

In the context of UV bulbs used in cosmetology, particularly for nail curing and skin treatments, wattage typically indicates the strength of the bulb and its effectiveness in emitting UV light for various procedures. While 9, 15, and 20 watt UV bulbs are commonly found in the market and used in salons and spa settings, 10 watt bulbs are not standard for these applications.

UV bulbs are generally designed to have certain wattage intervals that align with the technical requirements for specific tasks, such as curing gel nails. The absence of a 10 watt option can be attributed to the industry standard and manufacturing practices that favor other wattages for optimal performance. Therefore, when considering the wattages available for UV bulbs in cosmetology, identifying that 10 watt bulbs are not part of the standard offerings provides clarity regarding product availability and application efficacy.