Quote:
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Originally Posted by Bob_I
Quote:
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Originally Posted by StirCrazy
Bob, do you mean that your bulb are hanging up and down so that the screw part is up? if so you should try them horazontaly as these bulbs are not made for verticle use and this could be the source of your yellow on the AB's.
Steve
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Would you be so kind as to tell me on what you base this statement 
I have a bell shaped pendant of which I am sure Coralife has sold thousands over the years. It is a MH pendant which originally came supplied with a Coralife 5500K bulb.
In short who says the bulb I have is nor made for vertical use
I am not using the light anymore, because I don't get the ripple effect I got the light for. And the ripple effect is the only reason I would like to use MH light 
As far as color and intensity goes I am very happy with the 2X65W PC fixture that is on the tank now. |
if you look at bulb listings they will say weather they were designed for verticle, horazontal, or both. Given the shape of AB, USHIO, SA, and several others they were designed for horazontal use. normaly the bulbs that are ment for use in a hanging pendant are pear shaped with a large surface area at the bottom.
if you look at this bulb for example it is ment to be verticle with the base up and only a 15 degree variation is allowed
http://ecom.mysylvania.com/sylvaniab...19163302388End
this is aslo a factor because the shape of the glass cann affect the amount of PAR and the color out put of the bulb.
there are a few desagnations BU is base up, un is universal and I think H is for horazontal but I will have to double check that one.
Steve
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