For those of you that use MH
's, what bulbs do you use?
I've been using Hamilton 175w SE 14K bulbs for the last 5-6 years and have been happy with them. I tried those cheapo Ebay bulbs and thought they were junk.
I was checking bulb performance at Sanjay's Lighting site
and decided to order Iwasaki 175w 15K's. Instead of PAR (Photosynthetically Available Radiation), Sanjay does his measurements in PPFD (Photosynthetic Photon Flux Density), which is a measure of the number of photons in the range of 400-700nm falling on a 1 meter square area per second.
The Hamilton 14k's
are 29 PPFD while the Iwasaki's 15k's
are 71 PPFD (which, by the way, is higher than many 250w bulbs). I'm going to have to light acclimate my tank when I add these new bulbs as there is quite an increase in output. Has anyone used these bulbs and if so, how do/did you like them?
I figured I would add this if anyone was interested. This is the performance of all the bulbs
Sanjay tested using a 175w Advance magnetic ballast. The CCT is the actual color of the bulb. The Iwasaki is 15,215k colored bulb.