UV light is good for big jobs. But, for the small residential jobs, it's an encumbrance. And, must be used with caution. PPE must be worn when using UV light. This depends on the wattage of the lamp of course. Most businesses use low wattage which is not effective on some germs and viruses. For my business, it is much easier with liquids and sprays. Less PPE and don't have to lug the extension cord. Time is money.