Light
The light:
the previous opinion that the hard coral keeping exclusively with a
HQI lighting, has changed since the introduction of fluorescent tube technology in the form
the T5 tube can no longer hold.
Even under 'normal' fluorescent tubes T8, i.e. the thick, 26mm tube, it is possible
if the tubes are hung close together over the tank.
When using HQI burners, the 'light ring effect' plays a role for many pool operators
plays a major role from an optical point of view – the fluorescent tube, in contrast,
more like 'overcast' skies.
However, it has the great advantage that the flat illumination by the tube
better, all-round lighting of the corals, so that dark zones with their
typical tissue losses are hardly existent anymore.
When it comes to burners, those with a high blue content have currently prevailed,
which admittedly ensures optimal light supply for the zooxantella,
but often the pool as a whole appears very dark.
In contrast to this, the common burner from Osram called Daylight,
which makes the water look very yellow. This is detrimental to the well-being of the corals
There is nothing detrimental, but the visual impression of the viewer does not find
Like it. By switching on blue and white tubes
However, this yellow tint can be compensated for.
Even when using tubes exclusively, there are a variety of
Combination options to help the viewer discover their personal taste in lighting.
Here, the company ATI with its differentiated light colours should be mentioned, which can also be achieved by constant
Further development helps to optimize the light supply.
This is how burners/tubes with low color temperature (around 6000 Kelvin) produce purple tones
better showcase,
whereby green tends to shine in full tone under a high blue component (from 10 000 K).