How long does it take to turn on UV lamp in a clean room?

The cleanroom must be disinfected to ensure its absolute dust-free environment. Using ultraviolet disinfection is one of the most effective ways to keep cleanroom particle-free. How long does it take to turn on/off UV lamp in a clean room? In

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[With Ozone]: while emitting 254 nm ultraviolet rays, it will also emit 185nm ultraviolet rays, which decompose oxygen molecules and synthesize ozone;

8W UV Light with Ozone, Double Sterilizing, 110V UVC Sanitizer Lamp with ON/Off Switch Cord and Plug, 185nm Wavelength UVC Light with Connector and

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