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T5 Four Pin One End UV-C Germicidal Lamp

(6 customer reviews)


  • T5 4 Pin Base UV-C
  • Standard Industry Sizes
  • Length does not include Pins (Standard Industry Specification)
  • For Best Results Replace Bulb Every 8000 Hours or 6 Months (Average Life Span)
  • Quartz Glass Construction
  • Free ShippingWhen you spend over $49
  • TrackingKnow when your package will arrive
  • 30 Day ReturnsMoney back guarantee
  • Same Day DispatchWhen you order before 2pm
About Pondh2o basket shop


T5 Four Pin UV-C Germicidal Lamp, Greenwater or single cell algae problems can be eradicated using a UV light clarifier in your water garden pond.  Germicidal UV- C Bulbs are short for Ultra Violet Clarifiers also known in the pond hobby as ultra violet sterilizers. There are three bands of ultra violet light classification A , B + C.  Germicidal lamps for pond UV systems are 253nm and classed as C.  The longer the pond water stays in the UV light field will only add to the effectiveness of sterilizing the water.  Always ensure that the quartz glass is kept free of algae, to help stop the light becoming ineffective.

Bulb lengths:

  • 10w –  8.75” (222mm) Suitable for  Danner Pond Master ( Slit in Base)
  • 11w –  8.75” (222mm) Suitable for Hagen Laguna
  • 20w –  14.5” (368.3mm) Suitable For Danner Pond Master/Aqua Ultra Violet/Aquatop
  • 25w – 17.4″ (290mm) Suitable For Aqua Ultraviolet/ Emperor/Hagen Laguna/Pentair/Savio
  • 40w –  20” (508mm) Suitable For Danner Pondmaster (slit in base)
  • 40w –  33.5” (850.9mm) Suitable for Aqua Ultraviolet/Current USA/Emperor
  • 57w – 17.5” (444.5mm)  Suitable for Aqua Ultraviolet/Emperor
  • 80w – 33.5” (850.9mm) Suitable for Emperor/ Matala

T5 Four Pin One End UV-C Germicidal Lamp contains a very small amount of mercury which with the gas inside the lamp emit the bacteria killing light. Never look directly at a UV lamp when it is on as will damage your eyes.  The effective life of a replacement UV lamp is approx 8000 hours, after this point it will seem to be working but in fact the effectiveness of the lamp will be decreasing and needs to be changed. Changing a bulb twice annually will usually be good enough to maintain the filter light unit.

Visit PondH2o’s information center  for our Pond Blog on the proper way to install a water garden koi fish pond!  Remember to check our Facebook page often for latest coupons and news.

Additional information

Weight 0.5 lbs
Dimensions 10 × 6 × 4 in

10 Watt, 11 Watt, 20 Watt, 25 Watt, 40 long, 40 Watt, 57 Watt, 80 Watt



PondH2o search the globe for Koi Fish Pond & Water Garden products looking for original items to bring to the pond and water garden consumer in North America. Everything from Pond Pumps, floating plant baskets, mesh plastic baskets, Flexible Pond Liners to pond filters, decoys, solar powered Fountains  and pond decor. Check PondH2o's extensive inventory to see for yourself...
About Pondh2o basket shop

6 reviews for T5 Four Pin One End UV-C Germicidal Lamp

  1. Anonymous (verified owner)

  2. Eldon Elias (verified owner)


  3. Joe (store manager)

    Fast shipping! Great customer service, called to confirm the specs. Bulbs arrived safely packaged. Thank you for a smooth transaction.

  4. Susan v. (verified owner)

    • SusanPondH2o (store manager)

      Thank you so much for taking the time to share your feedback. Our team loves going above and beyond for our customers and we’re so glad you took notice. Hope we get the chance to provide great products, awesome pricing and fast shipping again! HAPPY PONDING!!

  5. Kimberly N. (verified owner)

    I was really not sure if this bulb would fit in my UV Stetilizer because according to the measurements was a smidge longer than mine. For the price I figured I would give it a try. It fit perfectly!! In 2 days my pond was clear ! I will no longer pay $75 for a replacement bulb!!

    • SusanPondH2o (store manager)

      Thanks for the feedback! We work hard to meet customer expectations, and we’re happy to hear we hit the mark for you. Come back and order again soon. Cheers!

  6. Kimberly N. (verified owner)

    Great product! Water was clear in 2 days. Ordering is easy and delivery is fast with great prices!!

    Image #1 from Kimberly N.
    • SusanPondH2o (store manager)

      Thanks for the awesome review! We work hard to meet customer expectations, and we’re happy to hear we hit the mark for you. Come back and order again soon. Cheers!

    • SusanPondH2o (store manager)

      This is a great picture!! Thank you so much for your review, we truly appreciate it!

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