uvb

3 года назад

This video demonstrates how to use a UVB light fixture with an LED grow light array. The presenter explains the importance of hanging height and safety precautions, and provides readings from a UVB meter to show the intensity and coverage of the light. They also discuss the potential effects of UVB on plant growth and the results of a long-term test on the fixture's durability.

1 год назад

The video tests the accuracy of UVB test cards, which are marketed as a cheaper alternative to solar meters for measuring UVB output from reptile bulbs. The tester uses a glass box to block UVB rays while allowing UVA rays to pass through, and compares the color change of the cards inside and outside the box.