I emailed the company about the led
tubes i asked about earlier about the nm of the light
The tubes use a 7500k white, plus a blue to further the temperature colour upwards. I have attached an LED
temperature colour chart for your reference. The 7500k temperature colour is in the 450-550nm wavelength region, and the blue is 430-450nm. Adding UV
(as we do, for UVGI ) pushes the wavelength down to below 400nm, giving a pretty good overall PAR spectrum. Adding the red will give you some of the lower spectrum, about 680-690nm. We use this for highlighting fish and plants that have an orange or red hue, not so much for the plants or cool/natural lighting effect. It is the white/blue that gives you penetration of water.
We haven't tested our tubes to get a PAR rating, but the feedback we get is such as 'my plants are really flourishing' and 'my plants were going yelllow, but since fitting my tube on Thursday, they have now grown 2cm!' I am confident you plants will respond well.
Hope this helps, thank you for your interest.