Overdriving lights.

[Acro]

enjoy your projects [img]images/smiles/icon_biggrin.gif[/img]

[reefburnaby]

Hi,

Oh...I didn't know that.... I am more familiar with the 120/240/347/600 stuff. I guess there are lots of other different ones too...thanks.

- Victor.

[Reefmaster]

steve our tank has dual 400 MH and a few 4' NO's. i'd be really interested in seeing the output. email me if you have a chance to check it out cuz i'm really curiuos how these suckers stack up against your guys black magic lighting projects here. shane

[DJ88]

mmmm.. 440 3 phase.. miss it.. [img]images/smiles/icon_wink.gif[/img]

Watched my smart a$$ boss try and show us youngins how it is done and change a fuse(120v) on one part of an equipment rack without isolating BOTH power sources. The 440 threw him 8 feet [img]images/smiles/icon_eek.gif[/img] [img]images/smiles/icon_eek.gif[/img]. We figure all the grease and slime from not showering for a week saved him.

He also tried to re-write the laws of physics and electricity one day.. [img]images/smiles/icon_rolleyes.gif[/img] [img]images/smiles/icon_rolleyes.gif[/img]

moron.. He left all the fuse changing to us youngins after that. [img]images/smiles/icon_biggrin.gif[/img] [img]images/smiles/icon_razz.gif[/img]

[ldzielak]

Can't wait to overdive my 2 NO lights on my Refugium. They are not giving me the growth I need. And this is much better than taking my nice PC box apart and using those lights.

So has anyone been thinking of doing a test to compensate for the water. Take an empty tank, no DSB and measure from the bottom glass with lights on the top of the tank. Yes you loose some from the bottom glass, but how much? Maybe this would be more representative, at minimum this give a worst case number. What do you all think?

Lee

[reefburnaby]

Hi,

We could take a light meter and wrap it with a clear water proof bag. What do you think of that ?

- Victor.

[StirCrazy]

hehe then how much does the bag reduce the light. [img]images/smiles/icon_biggrin.gif[/img] [img]images/smiles/icon_biggrin.gif[/img]
ok I had the opertunity to test a VHO actinic bulb run by a ice cap 660 ballast today. at the bulb the output was 650 footcandles @ the surface on a fairly new 110 watt bulb, by comparason a 96 watt PC at the same place was almost 6000 footcandles @ the surface.

Steve

[ 07 December 2001: Message edited by: StirCrazy ]

[reefburnaby]

Hi,

We can measure the difference between with and without a bag in air. Future measurements with bag can be calibrated out.


BTW, were those URI Actinic VHOs ?


- Victor.

[ 07 December 2001: Message edited by: reefburnaby ]

[StirCrazy]

true.. to simple actualy just compare them at the distancethat you will be using in the tank...

Steve

[titus]

Hello All,

Interesting thread. Nice to see the work/results of us trying to get ever more factful on the equipment we purchase. I wonder when we could do the same on protein skimmers and calcium reactor. um......

Anyway. I do have one major concern. While all these numbers are possibly useful when comparing the same bulb driven by the same ballast with different overdrive level, I don't know how well the test data can be used to compare different bulbs with different ballast.

Just like measuring radio signal's energy, we need to have available a receiver with a wide enough band to capture all of the signal's energy. Best thing is to be able to hook up a spectrum analyzer and have the machine show us the power response and total power. However, even at a low 300nm wavelength for blue light, the frequency is at 1tHz. To my knowledge, no spectrum analyzer operate at that high of a frequency.

Unless we have access to a light spectrometer somehow, we still are a step behind from being truly factful.

Just a thought.

Titus