Such lamps are found in two versions spotlight panel. The advantages include the compactness which is particularly attractive given the high intensity of the radiation.
However, positioning of metal halide lighting elements should be at some distance from the aquarium due to the strong heating of the bulb and thus the spotlight.
This group includes two versions known to all the light bulbs with the body of the filament in a neutral inert filling flasks or vacuum halogen counterparts inside which are added Halogens. Both emit too much heat which makes them unattractive for aquarium lighting. Another drawback is low efficiency in operation.
However, the spectrum of the lamps of these types are the closest to natural light. If previously there was no alternative today, there are led fluorescent and some other types of light sources.
Spotlights and panel in which the semiconductor crystals are not all experts define as one of the most popular types of devices for aquarium lighting. This is due to conflicting views about their use.
But technology does not stand still and already today you can find led spotlights characterized by several advantages
The result led spotlights can be installed in close proximity to the glass walls of the aquarium. The main disadvantage of a high price category.
This is a very popular option for organizations of aquarium lighting thanks to the following features long service life high level of efficiency in comparison with analogues with a filament.
However, fluorescent lamps contain harmful substances in the composition of the gaseous filling of the bulb mercury vapor. In addition to the lighting of the aquarium is only the special light sources designed for this purpose as other versions from this group are characterized by the reduced or discrete spectrum.
Comparing projectors based on semiconductor crystals and gas counterparts need to focus on a number of factors
The price of course the floodlights on the basis of semiconductor chips while significantly lose.
To purchase a light bulb for aquarium have guided the designated packaging parameters.
Watt is a unit of power lighting element watts. This value allows to determine the radiation intensity of the bulb and the energy consumption. Accordingly, the higher the load capacity the brighter the light.
This pattern at least applies to the diode light sources because originally, lamps of this type are characterized by very high emission intensity.
The necessary light output
Lumen the unit of change lighting power LM. Matter how great the value of this parameter will depend on the quality of light. The strength of the glow gives the opportunity to determine the effectiveness of the radiation. Different types of light sources are characterized by different indicators of this performance.
Color temperature is determined on this scale. The lower the value of this parameter the more warm yellow red orange light will lighting. For plants also preferred is a variant of bulbs with a colour temperature of 6 500 and above.
As indicated by the PAR unit of measurement of light emission in photons. PAR the term reveals the concept of photosynthetic active radiation. He describes the relationship between the strength of the illumination and photosynthesis.
PUR -this term reveals the concept of the useful component of radiation absorbed by algae under the influence of artificial light source different types. Accordingly, by using a PUR to determine the level of beneficial effects of light on plants.
A spotlight with any type of light source must provide sufficient light levels for the different types of plants individually. For example algae prefer low light output within 03 to 04 Wtlm average VTL and high-intensive growth Wtlm 055.
The light intensity of different light sources
The effects of an artificially light on living organisms and plants should not be made permanent breaks. To enhance the radiation intensity of the scattered light using reflectors.
Additionally, consider the level of heat lamps which will affect the location of lighting fixtures. From a number of existing lamps to a greater extent meets the requirements of performance based on semiconductor crystals.
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