Motivated by some ‘knowledgable’ aquarium enthusiasts, I was motivated to improve my aquarium lighting and install a 70W MH lamp. It was DIY setup, the steps for which i will post later. The lamp was a OSRAM HQI-TS NDL 70W, details :- http://www.osram.com/_global/pdf/Misc/Tools_Services/Downloads/106S012GB_POWERSTAR_HQI-TS_Excellence_GB.pdf
It was a 4200K lamp, so not ideal, however was told that it would work just fine.
So what do i think of the two philips CFLs (PL-L 36W/865/4P) vs OSRAM HQI-TS NDL 70W after a couple of weeks of operation, well I think the CFLs win hands down !!! And, what do i base the assessment on, simply on the oxygen bubbles i see forming on leave when i use the CFLs vs the MHs in the same tank….
However the jury is still out on the MH vs CFL debate, since the above is not really a completely fair comparison. Why? Because, the MH is 4200K and the CFL are 6500K, i am still hunting for 6500K MH but no luck so far where i live…