Recently added item(s)

You have no items in your shopping cart.

Product label 39W Aquarium T5 Fluorescent True Actinic (420nm) Tube Bulb

  • 39W Aquarium T5 Fluorescent True Actinic (420nm) Tube Bulb
  • 39W Aquarium T5 Fluorescent True Actinic (420nm) Tube Bulb Dimensions
  • 39W Aquarium T5 Fluorescent True Actinic (420nm) Tube Bulb Colour
  • 39W Aquarium T5 Fluorescent True Actinic (420nm) Tube Bulb Colour

39W T5 True Actinic (420nm)

39W - 850mm / 34” (l) – 5/8”- 16 mm(w) TRUE ACTINIC 420nm - Lighting with a higher blue component better simulates the softer shades of dusk, dawn and the blue hue of deeper water.

Availability: Out of stock

| |

PLEASE NOTE: These bulbs are not compatible with JUWEL Aquarium Lighting Units

39W - 850mm / 34” (length) – 5/8”- 16 mm (diameter)

High Output T5’s are better to use in your aquarium lighting than the regular T8 as they have increased water penetration and are more efficient. You don’t lose the illumination at the bottom of the deeper tanks.

With this lighting you are not restricted as much to the content of your aquarium, stock levels can be increased without the worry of inadequate levels of light.

The greater intensity, deeper penetration and Higher output allows you to stock your tank with a wide range of soft corals and allow them to flourish which was not possible with T8 Fluorescents.

Why T5's

Key Benefits of our High Output T5's:

  • Greater Intensity
  • Deeper Penetration
  • High Power

This true actinic tube has been specifically designed to bring out the vibrancy of your aquarium; the colours of your corals are very important when it comes to making an impression and with the addition of the T5 True Actinic, your corals natural blues, greens and purples will instantly become vibrant and more vivid. If you have corals with the ability to fluoresce then you will see colouration which will surpass expectations because lighting your aquarium with a violet hue (420nm) stimulates the zooxanthellae in your corals to produce the fluorescence you desire.

Because of the increased blue content of this tube, your stock will immediately benefit from its greater abilities in terms of water penetration...right down to the depths of your tank. The addition of this light will broaden scope in terms of stock and allow a greater range of soft corals to flourish as well as adding more illuminating colours to your set-up than ever before.

What is actinic lighting ?

TRUE ACTINIC 420nm - Lighting with a higher blue component better simulates the softer shades of dusk, dawn and the blue hue of deeper water.

This tube should not be used as a standalone and we recommend that you also invest in the IQuatics Marine White 14000k and the IQuatics Blue Plus+ to ensure that your aquarium is provided with all it needs in terms of light.

Check that your corals have the ability to fluoresce before purchasing this light…the main aim of adding it is to increase this feature.

39W - 850mm / 34” (length) – 5/8”- 16 mm (diameter)
54W - 1150mm / 46” (length) – 5/8”- 16 mm (diameter)

**Due to the tubes being FRAGILE we do not offer international delivery on this item**

Buy from iQuatics and benefit from:

  • Industry Leading Aquarium Lighting Customer Service
  • High Quality Brand New Boxed Goods
  • FREE Fast UK Delivery


We do offer FREE and speedy delivery within the UK and as with all IQuatics products you will benefit from industry leading advice and excellent customer service and support should you need it

Compatible with Arcadia, Giesemann, ATI, Korallen-Zucht,All Pond Solutions,Fluval
Tube Width 16mm
Total Output 39
Replacement Tubes 39w HO T5 tube
Tube Length 34" (850mm end to end/without pins)
Width 16mm
Colour Purple/Blue Hue
Base/Connector G5/T5
Mounting Method Lighting Pendant/Electronic Controller
Pin Distance 5mm centres
Length Without Pins 850mm (Approx)
Length With Pins 862mm (Approx)
Use Marine/Tropical
Use With iQuatics Reflectors Yes
Instructions Follow YouTube video for installation
Type of Ballast Required Electronic
Specification Standard IEC specification

Customer Reviews

T5s – Review by Charva (Posted on 13/10/2015)
Very good service and fast 100% keep it up
Brilliant – Review by Laura (Posted on 12/08/2015)
Fast delivery and very good
amazing customer service – Review by Beckers (Posted on 30/06/2015)
You guys are amazing and deserve every success. I couldn't recommend anybody higher.
35w t5 lighting – Review by mantis shrimp (Posted on 23/07/2014)
I always use iquatics t5 tubes as they are very good value for money with first class postage, all my fish and corals also enjoy the near as natural lighting.At there price you can renew the tubes more often than recommend, great products. Well done iquatics.
Awesome – Review by punk rock reef (Posted on 11/04/2014)
When I added one bulb to my Aquaone hood the colours where fantastic added the second bam even better! some good signs already with polyp extension etc.

Write Your Own Review

You're reviewing: 39W T5 True Actinic (420nm)

Tip: T8 Tubes are 8/8 inch (1 inch) in diameter (26mm). T5 Tubes are 5/8 inch in diameter (16mm). When measuring the length of your tube, measure in mm from end to end without the pins.

Product Questions:

There are no product questions yet.

Ask Your Question

  • By submitting this form you are agreeing to your data being used & stored for the purpose of responding to your question in accordance with our Privacy Policy.

* Required Fields

Choose a delivery that suits you 

Due to the nature of the products that we manufacture our delivery methods have to be selected carefully to prevent damages in the post. Here are some of the methods we use:

UK Mainland

  Time  Small Items  Large Items  Cost 
 FREE DELIVERY  3-5 Working Days  Royal Mail/MyHermes
 Monday - Friday 
 MyHermes £0.00
 1-3 Day Delivery  1-3 Working Days
 Between 8am-6.30pm 
Royal Mail/MyHermes  UKmail-UPS-DPD £2.50
 UPS Next Day Delivery  Next Working Day*
 Between 8am-6.30pm
UPS-DPD-UKmail  UPS-DPD-UKmail £3.99
 Next Working Day AM   Next Working Day*
 Before 12am
 DPD-UKMail  UKMail  £6.99
 Next Working Day PM   Next Working Day*
 After 12am 
 DPD-UKMail  UKMail  £6.99
 Next Working Day before 10.30am   Next Working Day*
 Before 10.30am
  DPD-UKMail  UkMail  £11.99 
 Saturday Delivery  Saturday Only

 Royal Mail Saturday Delivery/

 UKMail  £11.99

 *Business address must have separate entrance and be open to the public, business’s registered at domestic addresses must use residential delivery option. 

Islands & Highlands

 TimeSmall ItemsLarge ItemsCost
FREE DELIVERY 4-5 working days My Hermes  NOT AVAILIBLE  £0.00
2 - 3 Day Delivery  Monday - Friday  Royal Mail First Class Recorded Courier Islands & Highlands £14.99


ServiceZone 1Zone 2Zone 3Zone 4Rest of the World
  Small   Large  Call for Pricing  Call for Pricing  Call for Pricing  Call for Pricing
1 - 10 Days Royal Mail £7.99    -  Call for Pricing  Call for Pricing  Call for Pricing  Call for Pricing
1 - 4 Days DHL/UPS £5.99 - £15.99  Call for Pricing  Call for Pricing  Call for Pricing Call for Pricing
This site uses cookies. By continuing to browse this site you are agreeing to our use of cookies. Find out more here.