Thanks for clearing that up Hoppy. I think I get it now. It all kinda makes me feel a lot less knowledgeable than I did yesterday lol
I work at an aquarium shop, and we cater to everything from goldfish and betta bowls to high tech planted and reef set-ups. I just got this overwhelming guilty feeling for some of the advise I've given people coming to me for help. Its funny cause I'm supposed to be one of the plant guys at the store yet now I feel like I've been steering people in the wrong direction when it comes to LEDs and t5 replacement lamps/fixtures.
I guess I've been stuck in the old ways when I thought I was up on the new teaching and logic on the subject. So, just so I am clear on all this...
PAR ratings refer directly to available light, regardless of spectrum, but are all of these bands of light usable (PUR)?. And plants can in fact utilize the white light put out by 10K bulbs as well as they do the 65-67K ones? Also, since plants absorb the blue and red spectral range, is it safe to say that actinic and 50/50 lamps are more useful in planted applications than I was originally taught?
I also have a question relating to the above breakdown of the TrueLumen fixture's PAR ratings. That fixture only puts out 8000K light, correct? Correct me if I am wrong, but is a single spectrum of light (in this case 8000K) sufficient for plants to thrive? I was under the impression that it was better to have several different spectra of light available to the plants for photosynthesis. For example, I am currently running both 6700K and 1000K t5 lamps over my plants for this reason. So what I am asking is: Are these fixtures marketed at a specific spectrum worth the buy? I mean, based on everything we've said so far, it seems that the reason LEDs are so great is the wide range of wavelengths they put out, right? So when I see these TrueLumens, which ONLY put out 8000K, it seems to me that this fixture alone would not be enough to promote the growth we have come to expect from our lighting.
Sorry for all of the questions, I ask them as much for myself as I do for the customers I will be helping in the future...I take pride in giving the best advise in my area of expertise lol
Last edited by JoeD323; 06-17-2012 at 06:48 AM.