Actinic Blue T5 420nm

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Exclusively ACTINIC Blue Light from 400 - 510nm

  • Increases the fluorescence effect of coral and shells
  • Very long color stability through quality phosphors
  • Pure actinic light spectrum
  • Promotes coral growth
  • Beautiful light in the twilight phase
  • Amazing effects of all sea creatures
  • Made in Germany

Since most aquarium inhabitants live in seawater depths where the light is very blue, it is needed to simulate this natural living conditions in the aquarium. The Giesemann ACTINIC BLUE has therefore been developed to enhance the blue proportion in marine aquariums. Giesemann ACTINIC BLUE emits almost exclusively blue light of wavelengths from 400 - 510 nm, with a maximum at 420 nm. These wavelengths enhance the growth of many coral species in the aquarium, thus ensuring optimum lighting conditions. 

ACTINIC BLUE reinforces the natural fluorescence of corals and brings them excellent to bear - especially in the twilight phase when being used alone. The optimal use of Giesemann ACTINIC BLUE is the combined with either the Giesemann PowerChrome Super Actinic or Super Purple or combined with our MegaChrome HQI bulbs. Giesemann ACTINIC BLUE should never been missed for the lighting of coral reefs in any aquarium. 


T5 lighting has been a staple in the hobby with the ability to fine tune the spectrum of the fixture with different bulbs. Many successful reef tanks have used T5 bulbs as their primary light source. A mix of actinic and daylight bulbs will fill most fixtures however with all of the different options if you wish to bring out certain colors in corals or fish, there is usually a bulb that will help with that. T5 lighting is good for most tanks up to about 2 feet deep.


Tip: By keeping your water crystal clear will help increase the light penetration into the tank.


BRS takes the utmost care when packaging and shipping bulbs.  We are always trying to find the best possible way to ship bulbs and minimize breakage.  We are very successful at shipping bulbs, however if damage is to ever occur during transit please just let us know as soon as possible.

More Information
Lighting Type Fluorescent
Bulb Color/Temperature Actinic
Fluorescent Bulb Wattage 24 watt, 39 watt, 54 watt, 80 watt
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