[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Aquatic Plants Digest V3 #1249

>Date: Wed, 01 Sep 1999 12:55:37 +0800
>From: Alfred Heng <alheng at pacific_net.sg>
>Subject: MHD lights
>I have a question about MHD lamps.  The set up consist of a ballast, 
>capacitor and an igniter , them the actual bulb or lamp.  Do the 110v and 
>220v systems use the same bulbs?  Does going thru all the ballast and stuff 
>change the voltage or output to a set level making all the bulbs workable 
>in 110v and 220v systems?
>Does anyone out there know?
>Also would 5000K MHD bulbs be sufficient for planted tanks if you had  a 
>2-4 watt ratio?

Most today ballasts use a transformer (constant wattage ballast, etc) with
different primary winding - for 110V, 208V, etc. So, all you have to do is
just connect everything properly.