- Actinic Blue T5 420nm - Giesemann
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.
Old style blue actinic look. By A. GRANDIS on 11/23/2017A. GRANDIS would recommend this product to a friendThis bulb is very similar to ATI Blue Plus.
It seems a bit darker to my eyes, but almost unnoticeable. Many say there is no difference and that could be related to the ballasts used.
I don't have a PAR meter, so I'm not sure if it has the same PAR as ATI Blue Plus. If you do, please get 2 new bulbs and measure them from the same distance and conditions after "burning" it for 100 hours and post here the PAR differences.
Back in the day we already had bulbs called Actinic Blue and they were basically blue bulbs.
The True Actinic bulbs aren't the same. They have a violet/purple look to our eyes. If you look their spectrum charts you will see they have distinct properties and their peaks are different.
They are different and should be used for different applications in mind.
Most people use actinic blue bulbs, like the the ATI Blue Plus, with "whiter' bulbs to bring the fluorescent color of their corals. I believe the "true actinic" bulb will benefit corals and help the development of some of the pigments after a while, personal observations with zoanthids...
If you use this bulb with a True Actinic bulb you will emphasize those pigments even more.
The ratio many recommend is 1 or 2 "white" bulbs, 2 actinic blue bulbs and 1true actinic bulb.
Actinic Blue bulbs shouldn't be used by itself, just like the ATI Blue Plus. The balance with a "whiter" bulb will benefit the corals more IMO. The max I would go with these would be 4 actinic blue and or ATI Blue Plus bulbs to one "white" bulb. Ideal would 50%-50%.
I would suggest to use it with ATI Coral Plus, Giesemann Aquablue Coral or ATI Aquablue Special, as "white bulbs".
For the halide users... this bulb will be a great supplement to any 10K, 12K, 14K or even 20K bulbs out there.
I'll end this review also suggesting this bulb for the dusk period before the "whiter" bulbs to come on and after, reproducing the sunrise and sunset effects over the tank.
We are lucky to have such bulbs available! Gotta love T5s!
Perfect By Marcello on 3/8/2017Marcello would recommend this product to a friendbest bulb ever!!!!
Not what I expected By Fred on 3/16/2016Fred would recommend this product to a friendI bought this bulb as an actinic bulb, considering they call it actinic blue. The spectrum graph in he pics is NOT accurate and if you look at the packaging when it arrives, you'll see a very different blue spectrum (this an be seen if you look carefully at the pic of the bulb packaging on here). These bulbs are basically the same a an ATi Blue+. If you're looking for a true actinic bulb, go with the Giesemann Super Actinic or ATi True Actinic 03.
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