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Arcadia T5 Marine Blue Actinic 39W - 850mm

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Quick Overview

The Arcadia Marine Blue Actinic T5 lamp produces a spectrum which peaks at 420nm

Availability:Out of stock

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The Arcadia Marine Blue Actinic promotes welfare of invertebrates.

For a marine aquarium to realistically represent reef life, it is essential to provide the best conditions for corals and invertebrates to thrive. Most important in this is the survival of zooxanthellae, a specific form of algae, which symbiotically assists the invertebrates to feed and remove waste matter. In nature, the sun provides over 100,000 lux (lumen per sq. metre). At depths of typically 5 to 10 metres, where many of the corals and invertebrates are found, the visible light to be seen is basically only in the blue wavebands, thus the familiar blue appearance. All the other wavelengths, particularly reds have been absorbed and filtered out by the salt water. This remaining blue light is the light which invertebrates have evolved to utilise for zooxanthellae symbiosis.

The Arcadia Marine Blue Actinic has been specifically designed to illuminate and enhance the natural Fluorescence that is found among many fish and coral species. It does this by producing light at a spectrum that peaks at 420nm. This is the optimum wavelength to appreciate the natural colours.

The Arcadia Marine Deep Blue is available in 3 different lengths in the newer and more efficient T5 Model. T5 lights offer a better light spectrum meaning your aquarium will be bathed in light closest to those found in natural habitats. They have reduced power consumption but still offer higher luminance than the older T8 model and their compact size means you can more of them to create a beautiful aqua-scape.

  • The T5 has reduced power consumption due to the improved luminance rating, as it operates at a higher temperature. (This can provide typical energy savings of 30%)
  • The T5 has a longer lifespan, up to 25% longer+
  • Reduced mercury levels used in the lamps

Additional Information

Brand Arcadia
Barcode 830857000843
Tube Length 850mm / 34"
Suitable For Marine Aquaria
Wattage 39W

Customer Reviews

3 Item(s)

per page
Nice light Review by Carolyn
Very good quality lighting tube, gives a nice light that my LPS corals appreciated! Makes the zoas look really good too, have quite a deep tank so haven't used these with SPS. (Posted on 07/12/2012)
Just what I wanted Review by jason
I was looking in my local fish shop at this bulb was happy with the price of this bulb it came the next day so happy with that....the bulb gives a perfect contrast for my set up (Posted on 23/11/2012)
Quality T5 lighting Review by Andrew
I use one of these with a marine white tube for a tank that is approx 25" deep and works well for the coals which require a moderate lighting level. The balast I use does take 4 tubes in total however I find the lighting can be to much and causes my cocaine to fade. I also like through way that arcadia inform you of the lighting wave lengths. (Posted on 07/12/2011)

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Postage Information

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Orders over £30 are Delivered FREE!

Providing none of the items in your order require pallet delivery or are excluded from delivery promotions, we will give you free standard delivery. You can still upgrade this service if you wish, and will only pay the difference.


Pallet Deliveries are different.

For items that have to be sent by insured pallet or other special delivery, these are excluded from the standard delivery offer and instead follow a different system. Pallet deliveries are split into 2 tiers: tier 1 and tier 2. Pallet deliveries take 2-4 working days and cannot be tracked.


For pallet deliveries we will contact you to confirm the delivery address and delivery day before releasing the order.


Please note that the pallet delivery service is a drop at kerb only service, the drivers are not insured to handle goods into homes and you are required to dispose of the pallet.


Pallet Tier 1

This tier is for solo tanks and cabinets, or other solo high weight products that we can't send by a normal courier. We subsidies the majority of the true delivery cost for these items to offer the best value we can. The shipping cost for these is calculated at checkout.


Pallet Tier 2

New for 2020! We are proud to announce we now offer FREE mainland UK pallet deliveries for Pallet Tier 2. Pallet Tier 2 is for the larger full tank and cabinet sets, such as the beautiful Juwel Rio, Lido, Trigon and Vision ranges.

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