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Really interesting project. I can't help thinking the lights at the bottom are being wasted though - the soil level is so far above them.

Cool, thanks. My shopping list for this project is getting pretty expensive (need some new tools), but it seems like things should work :). No doubt I'll end up with more questions, but even if I don't I'll post a pic of the finished result :)

It isn't that I don't let it try to grow, but after the second set of leaves it tends to give up all by itself. I planted some a few weeks ago, so we'll see how they go this time round.

I never have any success with lettuce, spinach, leafy things. My tomatoes and herbs are fine, my chillis wonderful, but greens? Rarely get past the second set of true leaves before giving up the goats.

Is it possible to put pwm dimmers in parallel so that I can control output of warm white and cool white separately but on the same power supply? e.g. DC12V 10A -> PWM -> == Cool White == -> PWM -> == Warm White ==

Thank you both! That video is great. Apparently I need to buy some crazily thick wire, though...

@go banana and @Randomblame Wow, thanks for the really information dense posts :). I still think the ability to drop the voltage would be great, but I'm not sure how comfortable I am getting a power supply from ebay - not that I've been able to find one on ebay that is both able to provide...

Thanks for the suggestions - I don't want to take over this info thread with my questions, but I would like to know whether computer power supplies allow voltage adjustment etc. If you've got any more information can I suggest we continue the discussion on the thread I started "Powering LED...

Sorry about the invisible links - I've edited them to make them visible. I figured if invisible was this forum's style I should stick with it. I'd rather go with LEDs than fluorescent bulbs, partly for environmental/disposal reasons and partly for space saving reasons. I intend to combine the...

Sorry to ask what is probably a stupid question, but is this an appropriate power supply for about 7m of these LED strips? Is sticking them to aluminium, close together, going to be sufficient to dissipate the heat? Heat and electricity costs are my main concern, with original purchase cost not...

I'm really grateful for this thread too. I'm looking into cheap LED solutions and strip lights seem by far to be the simplest. The alternative seems to be wiring up 3W LEDs with star heat sink bases. Where I am hitting a wall is finding the right power supply... with the amount of strip lights...