The Aquael Decolight is a nicely designed product it has to be said, and its great light output makes it an ideal nano tank light. The Aquael Decolight is affordable and more than man enough to light a decent planted nano.
Let’s start with the most important aspect – light output: the Aquael decolight, the 11 watt version in this case, puts out enough light to satisfy all but the very trickiest aquarium plants. The bulb itself is fully submersible up to one meter and proudly boasts its IP67 rating on the side of the light unit. This is handy as it negates the need for a horrid waterproof cover whilst making the unit stylish and easy to assemble.
There are a variety of bulbs that will fit this light fitting, with the most common being the 6500k “sunny” bulb which I believe does a good job of replicating the colour of natural sunlight. You can also purchase an 8000k plant bulb as part of the “Duo” light which comes with a pink light used for making fish appear as colourful as possible. If you have a nano marine then fear not, there is also an actinic Duo light available.
These light temperatures and combinations seem to cover any possible requirement you may have for a nano tank, with the only drawback being that replacement bulbs for the Aquael Decolight can be slightly pricey compared to lights which use more standard fittings such as an E27 CFL bulb.
As far as the design is concerned, it is very easy to attach to the tank with the simple clip and comes with a reflector to maximise light output and efficiency. There is also an on/off switch on the cable which saves a second or two when turning it off – every little helps I suppose.