<a href=showthread.php?s=&postid=12319760#post12319760 target=_blank>Originally posted</a> by ksed
Sorry I forgot to mention it on the last post, do you use ethanol or any other form of bacterial supplement to keep the water clear.
<a href=showthread.php?s=&postid=12315675#post12315675 target=_blank>Originally posted</a> by bboy aqua
as long as its the ballast wattage and bulb match then that ballast will fire hqi bulbs
<a href=showthread.php?s=&postid=12335251#post12335251 target=_blank>Originally posted</a> by PaulErik
Most of the major brand 250-watt DE lamps are built to ANSI M80 / European high current (HQI) electrical specs. The ones listed in that article are built to that standard (3.0 amp lamp current).
I’ve been sent some sample 250-watt DE lamps and some of the Chinese imports really confused me after testing them. The North American companies importing these lamps were listing them as M80 spec lamps. Then I finally got in touch with the actual lamp manufacturer I found these lamps were actually built to another standard (ANSI M138/M153) which is a low current (2.1 amp) lamp. This maybe why some of the prebuilt DE fixtures are equipped with pulse start (ANSI M138/M152) ballasts. What gets more confusing is why the lamp manufacturer prints M80 on the lamps and packaging while the electrical data sheets from the manufacturer don’t even meet M80 specs.