Hi All
I have a few questin about lighting.

1) Is it true that blue light will make plant become shorter and denser. As for the red plant it will become more red?

2) If this is correct where to purchase blue light? I notice that Nirox PL tube have 1 white and 1 blue. Does this light really make plant grow shorter, denser and red?

3) How long can a PL light last? I was told that PL light need to be change every 3-4months. Is this true?

Thanks.