This is modern technology, not that CCFL shit what you get in Germany. This time I bought it for D3 production in winter.
but next time I want to buy same only with lower NM for area Desinfektion.
BTW: this D3 LED produces more effective D3 than the sun.
ask AI or read in pubmed. ideal for I'll people with D3 lock, or people who get not enough sun in summer. But do it only with uvb eye protecting glasses.
if you know the modern grow led chips, this is nearly same, power and quality, great!