Cheap lighting - ODNO

[spinjector]

Has anyone tried to overdrive one of those round fluorescent lights? I mean the ones bent into a circle shape like my grandma used to have in the kitchen way back in 19XX....? :-)

I saw a couple of other people mention in this thread that they have 15 XH tanks. I have one too; it's one of those odball sizes: 12x12x24h. The only fluorescent lights that would fit are those 1/2" thin ones like are used in those battery-powered camping lanterns. I was thinking that one of those round fluorescent lights would work really great.

They come in 9" and 12" diameters I think, and they are about 1" in diameter, which is the same as a T8. Since the cicumference of a circle is Pi times the diameter, that makes the 9" one 28 inches long, and the 12" one 36" long - putting both of them well into the range of "safe to overdrive" if I am understanding what I have read here in this thread.

Let me know what you all think. If I don't get a reply, I'll have to go get some bulbs and some saftey glasses and see if I can't blow something up.

[cprroy73]

Hey Lousybreed
I have those ballast 2 of them each on one 48inch t8 at 4x and they work fine are they 2n,3n, or 4n.

[FeatherfinFan]

I'm wondering what would be best for my 100gal as far as most light for the buck. I'm considering the WH7 or WH8 ballast and ODNO 6500kT8s. What I really want to know is what's the best configuration.
The WH7&8 both output 220watts, but the WH7 has four power leads and the WH8 has 6 power leads. I'm thinking I could use 3bulbs and have 2wires per tube w/ the WH8 rather than going w/ 2 tubes (2wires per tube) or 4 tubes (sinlge lead per tube) w/ the WH7. Just want to know what you pros recommend Thanks!

[GulfCoastAquarian]

I've got plenty of experience with the WH5, but haven't worked with the 7 or 8 with ODNO. Generally, one WH7 lead = two WH5 leads. So each WH7 lead would power a 55w PC or overdrive a F32T8 tube about 2x.
One WH7 and four 6500k T8's would be a great setup.

[mobile]

Sorry for resurrecting a really old post, but I have a question about overdriving PL (2G11) lamps. For starters, has anyone tried to overdrive this lamp type? Secondly, here is the ballast I have: http://tinyurl.com/7h5jeht, but I can't quite figure out how to connect the two outputs to a single lamp. Any help would be much appreciated.

[dbosman@msu.edu]

Originally Posted by mobile

Sorry for resurrecting a really old post, but I have a question about overdriving PL (2G11) lamps. For starters, has anyone tried to overdrive this lamp type? Secondly, here is the ballast I have: http://tinyurl.com/7h5jeht, but I can't quite figure out how to connect the two outputs to a single lamp. Any help would be much appreciated.

The wiring diagram on page 6 of the PDF, shows how to wire two PL lamps.

Many years ago, when power compact lamps were newish, several marine tank supply companies sold fixtures using standard four tube 32 ~40 watt ballasts wired to one PLL socket. Those were considered and sold as 65 watt ballasts. I've opened up a couple to install new waterproof end cap & cord assemblies.
I used some running 55 watt GE 9325 lamps on freshwater tanks. I noticed no difference between them and standard off the shelf 65 watt ballasts running the same lamps. Sorry, but I didn't even know what PAR was then so I've no data.

[mobile]

Originally Posted by dbosman@msu.edu

The wiring diagram on page 6 of the PDF, shows how to wire two PL lamps.

Yes, but I can't figure out how to connect the two outputs to a single lamp in an ODNO configuration.

[dbl_dbl17]

Just wondering, when you say there is an increase, does that mean an increase in micromoles/inch per second?

Reason I ask is this is one option for my 55g tank, and considering how I live in a remote place, would be much easier then ordering t5ho fixtures and bulbs, especially because I don't want to go overboard with the lighting.

[dbosman@msu.edu]

Originally Posted by mobile

Yes, but I can't figure out how to connect the two outputs to a single lamp in an ODNO configuration.

Newer sockets usually have the two sides connected by a jumper wire. Older ones may not be connected. ODNO makes use of the second output by wiring one to one side of the socket or to one pin on the end of a lamp, and one output to the other side of the socket or the other pin on the lamp. PLL lamps are essentially a long lamp, bent into a U shape. One outer the nearest inner pin are the same as one end of a standard linear lamp. The other outer pin and the one next to it, are the other end of the lamp.

If the socket is already connected by a jumper, you have to cut that.
Here is the diagram, from one of the original articles, that helped me figure out how to wire things.

One note. Though I did experiment with ODNO in the past, and it works, I've come to prefer two T5NO lamps over my tanks.