Why do you want to use an electronic ballast?  They will cost you a lot more
money, and IMHO they have a better chance of failing compared to a TAR
ballast.  They probably use a little less electricity and produce less heat,
but I don't think they have any affect on the light output.  The bulbs are
rated at a certain wattage and voltage.  That's all that matters.  I have
been running two 250 watt 6500k Iwasaki's off of standard TAR ballasts from
a local electrical supply store for over 5 years now.  They cost me about
$65/each.  FWIW

Craig


> The main reason i'm asking is because i want to use an electronic ballast.
> The icecap will only use 250W Iwasaki bulbs, and the other company (ocean
> motion i believe) works with only 400 Watt bulbs.  I know the Iwasaki
bulbs
> are great, but will it provide enough light for sps, clams and the odd
lps?
>
> While i would like to try comparing the two different bulbs the ballasts
> won't allow it.

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