UV is the abbreviation of Ultraviolet in English, that is, ultraviolet. Ultraviolet (UV) is invisible light, which is a section of electromagnetic radiation other than visible violet light. The wavelength is in the range of 10~400nm. It is usually divided into the following sections according to its different nature:
AVacuum ultraviolet (VUV), the wavelength is 10-200nm
BShort-wave ultraviolet (UVC), the wavelength is 200-280nm, this waveband can be sterilized.
Ultraviolet spectrum
C Medium-wave ultraviolet (UVB), the wavelength is 290-320nm
D Long-wave ultraviolet (UVA), with a wavelength of 320-400nm, can be used for photocuring and printing
Ultraviolet (UV) is used in industrial production, and long-wave UV (UVA) is generally used internationally.
Let's introduce you to the comparison of the two best UV light for plants growth lamps.
Futur Vert HortiUV LED 30W UV 385NM Bar

Power: 30W (± 5%) PF > 0.9
Voltage range: 100-240 VAC/100-277VAC
Current range: 0.18A-0.065A/0.3A-0.11A/0.4A-0.15A/0.6A-0.22A
Frequency range: 50/60 Hz
Inrush current: < max. 25A (t< 1 msec)
Isolation class: Class I
Operation conditions: 0°C to 40°C / 32°F to 104°F (95% RH)
Storage conditions: -20°C to 65°C /-4F° to 149°F (85% RH)
Photon flux (μMol/s): 40,66,88,132μMol/s
Efficiency (μMol/J): 1.9 - 2.2 μMol/J
Horticulture Lighting Group HLG 30 UVA Supplement

The perfect way to add beneficial UVA light to any HLG 550 or HLG 600H LED grow light!. The HLG 30-watt UVA LED bar light contains 365nm + 385nm UV-A which increases your plant yields and makes your plants resistant to fungal infections. UVA light is proven to trigger increased resin production during the final stages of medicinal uv light for plants. This waterproof plant light can withstand humid and wet environments. The passive cool design of the light makes it energy-efficient and cuts down your electricity costs.

Advanced UV Light Delivers Better Yield: UVA and near-ultraviolet light (365-385nm) are very beneficial for plant development. Scientifically proven to increase resin production in medicinal plants plants.
Reliable Passive Cool Design: It comes with passively cooled LED bars that provide even light intensity across the whole canopy while keeping the noise down.