Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




123 posts

Master Geek
+1 received by user: 12

Subscriber

Topic # 185712 2-Dec-2015 16:06
Send private message

I've just bought a 2 foot LED fluorescent tube replacement (It comes with an "LED Starter") but only have a 4 foot fitting. By the looks of things it'd be very easy to shorten the fitting - take an end off and chop the steel to the new length.

But, there's an electronic ballast included in the fitting. Does anyone know if this differs depending on the length of the tube? Would I endanger my tube using the ballast from a longer tube fitting?

Create new topic
660 posts

Ultimate Geek
+1 received by user: 36
Inactive user


Reply # 1439351 2-Dec-2015 16:16
Send private message

the 1200mm is catered to power 36w/ 28w / 54w

and 600mm is catered to power 18w/14w/24w

so there is quite a bit of difference here :) 

20259 posts

Uber Geek
+1 received by user: 3822

Trusted
Subscriber

  Reply # 1439354 2-Dec-2015 16:21
Send private message

Led retrofits only work on magnetic ballasts.




Richard rich.ms

 
 
 
 


660 posts

Ultimate Geek
+1 received by user: 36
Inactive user


  Reply # 1439357 2-Dec-2015 16:26
Send private message

there is also another type though :


 

Type B: LED tube has an Internal Driver and is Wired to Main Voltage Bypassing the Existing Fluorescent Ballast (aka Bypass, Internal Driver)

 

How it Works

 

With Type B LED Tubes, the ballasts are removed from the fixture or bypassed, and the sockets are wired directly to the line voltage. Typically only one socket end has the line voltage and the other end is there to hold the lamp in place. Many fluorescent fixtures have shunted sockets so often times you will need to replace the line voltage socket to a non-shunted socket.

20259 posts

Uber Geek
+1 received by user: 3822

Trusted
Subscriber

  Reply # 1439403 2-Dec-2015 17:03
Send private message

If it requires modification to the fitting it is not a retrofit lamp. I was not able to find out what the legal situation with those is, as anything modified fitting wise creates a saftey issue if someone sticks a fluro tube back into it. Best I could get was a "I don't think that's a good idea".

The losses from the ballast being in series with the power to a switching power supply are minimal, and leaving that there means the fitting is still safe if it gets re-lamped with a fluro tube. If the fuse starter is still in place, it will just run the heaters and not light, if it is also replaced with a switch starter then the tube will work.

The only ones legal here are single end power with the other end shorted and a fuse to replace the starter, many cheapies off ebay/aliexpress are live at one end and neutral at the other and require the starter be removed. Means that if you touch one end while putting the other in, you get a shock which is non-ideal. If you fit a starter and put the tube in then sparks and bang will happen.




Richard rich.ms



123 posts

Master Geek
+1 received by user: 12

Subscriber

  Reply # 1440656 4-Dec-2015 17:28
Send private message

Thanks all.
My fitting is definitely an electronic ballast version, so no use for this either way. The actual element is a Verbatim 64353.

Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Vodafone TV — television in the cloud
Posted 17-Oct-2017 19:29


Nokia 8 review: Classy midrange pure Android phone
Posted 16-Oct-2017 07:27


Why carriers might want to embrace Commerce Commission study, MVNOs
Posted 13-Oct-2017 09:42


Fitbit launches Ionic, its health and fitness smartwatch
Posted 12-Oct-2017 15:52


Xero launches machine learning automation to improve coding accuracy for small businesses
Posted 12-Oct-2017 15:45


Bank of New Zealand uses Intel AI to detect financial crime
Posted 12-Oct-2017 15:39


Sony launches Xperia XZ1, a smartphone with real-time 3D capture
Posted 11-Oct-2017 10:26


Notes on Nokia’s phone comeback
Posted 10-Oct-2017 10:06


Air New Zealand begins Inflight Wi-Fi rollout
Posted 9-Oct-2017 20:16


The latest mobile phones in perspective
Posted 9-Oct-2017 18:34


Review: Acronis True Image 2018 — serious backup
Posted 8-Oct-2017 11:22


Lenovo launches ThinkPad Anniversary Edition 25
Posted 7-Oct-2017 23:16


Less fone, more tech as Vodafone gets brand make-over
Posted 6-Oct-2017 08:16


API Talent Achieves AWS MSP Partner Status
Posted 5-Oct-2017 21:20


Stellar Consulting Group now a Domo Partner
Posted 5-Oct-2017 21:03



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.