Originally Posted by ThrowedToad
WOW! Can I get an update? This is exactly what I am trying to do. The cost of lights is SUPERDUMB! Good luck, by the way my whole tank is DIY except the lights!
Heyyy! yeah it works well. The only thing is there seems to be less 420nm (purple) waves in the car HID bulbs than the metal halides. This promotes green algae growth on the live rocks, Since my last modification (October 20th) a few days ago, The rocks were live with growth, this means there are coraline algae growing on them. The very back piece has a huge purple patch full of small colonies of coraline algae growing. The polyps I had on the rock had already more than doubled in size, I counted 13 round heads growing initially, and now theres about 35 heads or so.
Ive decided to go with a final mod of 96watt 50/50 power compact as that gave more wattage than the dual HIDS at 35 watts each. The other contributing factor that made me change my setup was that the way the light was mounted blocked my view out the window, and trying to open and close the window was rather difficult with the shelf in the way (the shelf was used so I could mount the HID lights onto it).
Another factor was that the HID ballast produced a high frequency hum, this hum was equally loud as the fans on the oceanic biocube.
Anyways, if I were to do this again, I would find a quiet ballast, and a slimmer housing for the HIDS, BTW, any plastic near the HID Bulbs will melt, so you need to use glass.
Best of luck!