High power led's, some noob questions

[NicholasOConnor]

I've saved up some cash to experiment wiuth some led's. Im a total noob, but have wired a basic array of 10mm leds in series...thats about as technical as I get...lol.
I was browsing topbrights ebaystore and found these
http://stores.ebay.com.au/TopBright...0QQcolZ4QQdirZ1QQfsubZ293068015QQftidZ2QQtZkm

how would one go about wiring up the 25 watt ones? I found a really good deal on some and would like to experiment with them....see how much par they give off. Ild also be interested in plant growth for some of my vivariums. I know there are much more efficient ways to light my vivs, but I would just like to knwo if they wopuld be hard to wire...like o they need anything special to power them?
Sorry for the dumb question...just trying to figure out how Im going to play with these.

 

[LukeA]

Those are very expensive and not very efficient. There are threads on this forum that talk about the wavelengths and intensities useful for plant growth.

 

[Oznog]

Right. That type has been around on some of the Chinese electronics sites for years. It's not only obsolete but very expensive!

A P7 for $20 will produce almost as much light at a fraction of the power, and a fraction of the heatsink design cost. 'Cause dissipating 25W of heat is a LOT when the emitter needs to stay cool. Up to 900 lumens at under 12W for the P7.

Look up the plant growth threads, but it comes down to this: the blue and deep red wavelengths are strongly utilized by plants. White LEDs probably won't do much to grow plants. "red" LEDs are not DEEP red and largely miss the photosynthesis response peak (680nm IIRC). LEDEngin (Mouser.com vends them) is the only readily available power emitter of deep red that I've seen.