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I have tracked down the model I bought of ebay secondhand to this website for $18, not sure about how much shipping would be. Also two of these and a cheap household dimmer could work suggested by another member, but haven't tried it. Also this one you...

Yes I know all about this, I would say the LED's running at full brighness were hot but are at about 70c still ok to touch. Turning them down to 70% would make the last for their full lifetime IMO. I do however recommend that people do use these with an additional heatsink if possible, even...

Yes that is a good point, the heat transfer seems to be quite good as they are pressed tight against the PCB, although I am sure a spot of thermal glue/compound would be a good idea. I will let you know how mine go that I have made without.

No they were ordered in from Hong Kong, thanks.

Yes I will try and get a journal up soon to document the growth progress of the plants

The other day I was asked to create a thread on how I made my DIY LED lighting unit, I have got together a few photos that will hopeful help demonstrate how it is done, I also have a few LED's for sale over on this thread, so if anyone is interested get in touch. Here are the LED's used...

Can anyone think of a good use for these, they look cool but cant think of how they might be used NAG Aqua Music-The World's Smallest Air Stone(Set of 3) | eBay

Eh! most heat mate are quite low watts, but might try a slightly oversized 20w and see what happens.

Yeah I know what you mean I have kept fish unheated as well for short periods of time, but it's not really good practice, don't want to get depressed fish:dead: My house can get quite cold sometimes, so was looking to raise the temp a bit, was looking at the super small Newattino heaters, the...

Sorry mate didn't realise you ere not using cree XML as written by someone else above, depending on what led you are using the driver current might be a bit high for these, think most 3w led's are 700-950ma and your driver is 1500ma

How did you wire them? XMLs have a 3.1v forward voltage at 1500ma so you would need 4 LED's in wired in series for them to work. Test the drivers with a mutimeter or another 12v device (or your tongue) if possible to see if you have a working driver, just make sure you don't test the 240v...

Hi bit of a strange question, but I am looking at making a nano tank using the Walsted method, keeping all hardware out of the tank (no heater or filter). I was wonder, does anyone have any experience using a reptile heating mat under a tank in order to raise the water temp, is it at all...

Hang on a min Jack are you not suposed to be an architect? you should know about the British standard code of practice for design of joins in building and construction. Get to know! :crazy:

Well both conform to the British standard code of practice for design of joins in building construction and conform to ISO11600, so will be of adequate and similar strength. The one you suggest above is for use in glazing, for example sealing glass into window frames. and the one I suggested is...

Silicone is silicone, It is just fundamentally strong if used in the correct way.

Just make sure it's non-antifungal I just purchased some of this for a good price. 1 x HA6 SILICONE RUBBER SEALANT, RTV, ENGINEERING GLASS WATER FLEXIBLE HIGH MOD | eBay

Just make sure you dont go for the dimmer ones, bought some the other day and they dont work on light or solenoid.