Question to all LED DIYers about my powerbrites

[smoq]

Today I messed with my tank after yesterday's swap (it was greeeat) and accidentally one of my current powerbrites fell into water, so I needed to open it up and let it dry. While I was doing this, I snapped two pictures and begun to think of changing the diodes. Well, I have two powerbrite strips but I made a mistake and bought one with two blue and two white leds. The white ones are useless so I thought of changing them to all blue. Can it be done? If yes, what kind of leds should I use? Is it possible for example to solder two 2w cree leds in place of those white 1W current ones? Thanks for your answers.

Here are some pictures.

 

[shawn]

It looks like you got a resistor in there so i would put a 1W cree ,if you go with 2W cree you gonna fry the unit

 

[aznt1217]

Lol good luck getting those out. They look like they are soldered on very tight.

 

[smoq]

Lol good luck getting those out. They look like they are soldered on very tight.

Actually, it looks like they are soldered only in two points so I think I'll be good. Do you guys now where would be the best place to get (or maybe somebody have two spare) 1W cree leds?

 

[SevTT]

When hacking electronics, it's best to replace the module with another one with identical characteristics, as far as operating voltage, wattage, and resistance go. The latter isn't a problem with LEDs, since they have negligibly small forward resistances, but if you change either of the other values you're going to have to at least have some knowledge about electrical circuits to modify the design to make it work.

 

[smoq]

When hacking electronics, it's best to replace the module with another one with identical characteristics, as far as operating voltage, wattage, and resistance go. The latter isn't a problem with LEDs, since they have negligibly small forward resistances, but if you change either of the other values you're going to have to at least have some knowledge about electrical circuits to modify the design to make it work.

Yes, I am aware of that, I wanted to know what kind of leds current use for those fixtures. Do you know where to get 1W blue diodes?

 

[stage3-S4]

Yes, I am aware of that, I wanted to know what kind of leds current use for those fixtures. Do you know where to get 1W blue diodes?

You can not simply just solder in a 2watt led in place of the 1 watt. The resistor is there to limit the current through the LED.(Current limiting Resister). That looks to be like a Surface mount LED which is not the easiest thing to solder/desolder. If you are serious about doing it, you should get a hot air station with a nozel set and some solder paste. I picked one up recently best 175 bucks I have spent. I can solder x7r SMT caps and psop-8 ICS with ease.
http://www.sparkfun.com/commerce/product_info.php?products_id=76

 

[SevTT]

Yes, I am aware of that, I wanted to know what kind of leds current use for those fixtures. Do you know where to get 1W blue diodes?

Not a clue, sorry. While I like LED fixtures, and have looked into their viability, they're so expensive that I haven't done that much research on the specifics.

 

[JonnyJ]

Smoq I might have found out where to get those exact bulbs, I'll add a link here when I get home. On train home and phone is about to die.