Dual Scale Portable Salinity Refractometer – ATC 0-100ppt (0-10%) & 1.000-1.070 Specific Gravity, Portable Meter Tester for Seawater, Salt Water, Aquarium Brackish Reef Tank

【Powerful Black Lights】: Each 6W UV black light tube with premium quality and 28 units ultraviolet LED, 200 degree wide beam angle.Wavelength: 395-400 nm, UV-A level. No harmful to retinas or skin.Instant start,no buzzing ballasts,no flickering.
【Wide Application】: It is best known as black light for bedrooms, but really there is no limit towards its applications. Blacklight performance, face painting, glow parties and blacklight parties. Currency and Certificates authentication. Curing and sole restoration. Scientific activities and experiments. Aquarium lighting and sterilization. Vaseline glass and uranium glass lighting. Plant growth lights. Detecting certain insects and stains/urines.
【Easy Installation】: Each T5 LED tube comes with a 1m/3.28ft USB cable with on/off switch.Just connect it to any USB port or any adapter with 5V USB port. Long lifespan,30,000+hours, low power consumption, environmental product.
【Additional Details】: Super portable and light-weighted led blacklight.Low power consumption.Shatter resistant and vibration resistant.It comes with 3M Adhesive tape,which can be directly install,just sticking it to the back of UV blacklight.