It can be applied to fish tank, aquarium, pool, ponds,etc. It is submersible.

Description:
Body Material: Quartz Glass
Voltage: AC 220-240V
Frequency: 50/60HZ
Wattage: 5W / 7W / 9W / 11W (Optional)
Power Cable Length: 2m
Lamp body Length: 5W: 190mm; 7W: 240mm; 9W: 260mm; 11W: 260mm
Diameter of Tube: 26mm
Life of the Lamp:8000hrs+
Plug:US Plug

Package Included:
1 x UV Light Sterilizer

Note:
Please allow 1-2mm differs due to manual measurement, thanks.
Please DO NOT use this lamp as ordinary lighting, DO NOT expose the fish directly under the UV light for long time, please install and place it in the filter tank or the other place that the light can not leak out.