not really.
the lighting stuff can be a bit Confusing.
With fluro tubes wattage has little to no effect on "brightness" or you could say par.
just thik of a 2ft tube compared to a 4ft tube. is the four foot tube brighter per Foot of tube
There are different bulbs with different K (kelvin) rateings. depending on the K rating, this can give the impression of being brighter or dimmer.
yip.
or if you want to have a bit more fun, poor a bit of meths down into the crack and light.
SAFETY NOTE
don't let children play with matches to offen
No need to tap the glass as this can cause (to the untrained) to run off.
just scribe
put a wooden pencil in the centre of the scribe. (on the underside of the panel)
then push down with even pressure on both sides untill it breaks.
you could also go down to your local glass shop and ask them to show you.
i am concerned about that calculator.
Safty factor of 1.2? there is no way that would hold up.
your water would be on the floor within a week. even 12 no good.
just push a little bit of glue out of the red tip, leave to dry. next time just pull it off and away you go.
the glue won't etch into the glass, nothing will. you will find if you give the cloudy bit a good rub or get a new sharp razor blade it will come off.
very interesting.
By the way does anyone have the link to Sanjays page that has all diff types of bulbs listed and there par rating?
i have the main page but can't seem to find the one with all the par ratings
http://www.reeflightinginfo.arvixe.com/
This is also good for articles about ballasts, bulbs and reflectors.
http://www.personal.psu.edu/faculty/s/b ... arium.html
couple of 25mm bulkheads should be fine, as for sump heaps of designs around, they do not have to be that big either, for that size tank a sump around 900 x 450 x 450 would be sweet.
What rate are you getting the glass for??