par

Hi Folks, Although I have a spectrometer, which enables me to check freshwater aquarium lighting spectra, I do not have a PAR sensor/meter. And I don't like guesswork. So, I'd like to hire/borrow/purchase a decent PAR sensor/meter. The Apogee range looks interesting. I am drawn to the Apogee...

Hi everyone, First time poster but long time lurker/ admirer! I have a question I hope someone can help me regarding what bracket/ tier of light range I fall under. I have a Trigon 190 and have a Helialux Spectrum LED. Here is a link to the website with my light...

Hi, I have just redecorated my low-tech, and have only floating plants. These plants are categorised to have "medium" light needs, so I would like to have a some kind of an idea of a suitable PAR range on the surface. Also, I am happy to hear any experiences of floating plants which adapt...

Some food for thought... [edited for easy reading 14.03.2017] In some discussion's with Nuno we thought would be nice to have some data about LED's. Remember that this data is not 100% scientific, but we tried to keep the same test conditions for all fixtures. In the worst scenario, the...

Despite doing just about everything that i've read to address this, i'm persistently getting staghorn algae and some GBA. The staghorn is mainly affecting Juncus Repens, and to a lesser extent the Weeping Moss. It is not touching the Rotala or Hydocolyte or Crypts. Trying to pick it off with...

As far as T5 tubes are concerned, I can see that wattage reflects on the length of the tube: 24W @ 438mm 28W @ 590mm 35W @ 742mm 45W @ 895mm 54W @ 1074mm Seems there is a "naive correlation" between length and wattage (a factor of ~0,05) Going to extremes, is it safe to assume that a 24W tube...

Hello, I have some questions about the light. I believe many of us have the same issues, the first doubt is: Is the light the best possible? About a year restarted the hobby and quickly became a fan of the LED . Now i'm 100% LED (nothing against other lights) is just my preference. But i...

hello everyone. does anyone use the digital camera sensor to read PAR? we can read lux values with a simple convertion factor, would be simple with PAR also? simple lux meters don't read out off green to well, but digital cameras do (the visible spectrum, and some more than that). Maybe this...

Quick question: does PAR include UV light, specifically UVA & UVB? Many thanks from Bill. :D