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Fixing MH bulb


nannochloropsis
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Another question to pop is the position of the MH bulb.

Parallel to tank length or perpendicular ?

Regarding placment of bulbs, there are many factors to be brought into consideration...

Firstly would be the bulb life due to placement.

If you pay attention to the bulb specs, manufacturers do state the position for optimum lifespan in regards to their placement position,

for eg, Iwasakis MT 250 have universal placement... that means they can be placed vertically or horizontally...... without much effect to bulb lifespan..

in regards to whether bulbs are placed perpendicular or Parallel to tank length depends also on how your reflectors are placed....

Most single ended bulbs are placed perpendicular to get the best light output...

double ended bulbs seems to be placed in parallel position....

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When changing the MH bulb, where should the tip be pointing? Upwards or downward pointing to the water?

Are you referring to the nipple or the position of the whole bulb?

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Nipples should always point up :)

I remember reading somewhere about letting the gases expanding inside bulb needing to go somewhere, and they go into the nipple.

Also nipple pointing down does cast a little small shadow.

Happy nippling! :lol:

AT

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I won't show you the nipple, but here's a person who would:

This thread is rather interesting because we can the opinionated americans utilizing their god-given right to shoot their mouths off at each other without regard... heh!

That aside... you will learn a lot of stuff and see some comparison pix (after the initial cockfight)... here

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Ooooo, Naughty naughty.......

ACtually one up and one down.... dun notice difference leh but.... for those who are particular about nipple being up or down.... you can actually control that easily by attaching your screw base with L shape brackets.... then bend to your desired position.....

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