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Good idea. Thanks.

So it might be better then, to cut the 1m strip of leds into 3 x 33cm lengths, make the scrubber a little wider, 3 inches and arrange the strips in parallel so that the light was evenly spread.
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Cheers You don't think the placement of the LEDs might be an issue with something that narrow?

I was thinking of using 4 x 3w but perhaps 6 or 8 lower wattage ones might be better?

Or something...

Forgot to mention, obviously the glass between the chamber and the lights would need regular cleaning which would present a problem if the chamber were to be fixed.

Thought this might be achieved...

Considering building a trial long narrow UAS which could fit into (or be built into) the rear corner of a tank and illuminated from behind (like SMs HOG versions)

Thinking of having it (for my...