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> T8 Fluorescent LED Tube Light replacement, Retrofitting LED tube to existing casing

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frostier
post Jan 4 2018, 10:45 AM

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QUOTE(advocado @ Jan 4 2018, 09:38 AM)
for the T8 casing, do you utilize all 3 wires including Earth? since LED normally only have Live & neutral. do you connect the earth to some screws on the metal casing?
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Yes. Earthing to the casing as standard practise.
This is to obtain class 1
frostier
post Jan 4 2018, 10:45 AM

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QUOTE(advocado @ Jan 4 2018, 09:38 AM)
for the T8 casing, do you utilize all 3 wires including Earth? since LED normally only have Live & neutral. do you connect the earth to some screws on the metal casing?
*
Yes. Earthing to the casing as standard practise.
This is to obtain class 1
SUSadvocado
post Jan 4 2018, 10:57 AM

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QUOTE(frostier @ Jan 4 2018, 10:45 AM)
Yes. Earthing to the casing as standard practise.
This is to obtain class 1
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can i use a wire connector and insert it between the bracket & screw (into plug), or will i risk damaging the connector if i screwed the screw in too tight to the ceiling?
frostier
post Jan 4 2018, 11:02 AM

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QUOTE(advocado @ Jan 4 2018, 10:57 AM)
can i use a wire connector and insert it between the bracket & screw (into plug), or will i risk damaging the connector if i screwed the screw in too tight to the ceiling?
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Sorry. I think I lost you here.
The purpose to connect the Earth wire to the chassis is to act as protection if there’s leakage from AC (Live/Neutral) which will trip the circuit breaker
SUSadvocado
post Jan 4 2018, 12:32 PM

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QUOTE(frostier @ Jan 4 2018, 11:02 AM)
Sorry. I think I lost you here.
The purpose to connect the Earth wire to the chassis is to act as protection if there’s leakage from AC (Live/Neutral) which will trip the circuit breaker
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the support bracket is normally metal, once you install the bracket then you can screw the light casing onto the bracket. so if i use those wire connector (donut) and slip it between the screw & casing it will work right? because that is the only place which have screw to secure the ground.
frostier
post Jan 4 2018, 12:54 PM

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QUOTE(advocado @ Jan 4 2018, 12:32 PM)
the support bracket is normally metal, once you install the bracket then you can screw the light casing onto the bracket. so if i use those wire connector (donut) and slip it between the screw & casing it will work right? because that is the only place which have screw to secure the ground.
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Yeah. As long as the wire is connected to the chassis
SUSadvocado
post Jan 4 2018, 01:55 PM

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QUOTE(frostier @ Jan 4 2018, 12:54 PM)
Yeah. As long as the wire is connected to the chassis
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hi, might be out of topic, but to mount a T8 on a plaster ceiling, is it too heavy to mount directly on the plaster, or require some sort of support bracket.

i know how to install proper support bracket from ceiling to near the plaster using 2 sets of L shape bracket with plugs, however i don't know how to do the bottom part. most i see just use wooden blocks, so the light bracket will screw into the wooden block? wouldn't the wood block crack & chip resulting loss of grip?

because if you try to secure the lights bracket to the L shape frame, would require a bolt & nut, to tighten the nut would require access above the plaster ceiling which means impossible to reach.

sorry because the lack of info on this on google.
TSmot88
post Jan 4 2018, 10:41 PM

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QUOTE(frostier @ Jan 4 2018, 07:49 AM)
Cons: magnetic ballast consume 6-8 watt in additional to led tube wattage. I am not sure if the life of the tube is shorter using this method but the function of ballast is only limiting the current flow. LED need less current than normal tube

Correction - ballast will not run at 6-8watt but instead contribute 1w as the current draw from the LEDTube is lower. Hence the resistance on the ballast is lower.

Secondly as the ballast act as step down transformer, there is no impact on the LEDTube lifetime. Unless the ballast is pretty worn out and need to be replaced. After all nowadays magnetic ballast (even tho low loss) the material used are inferior compared to last time.

With the ballast, it also act as a layer of defence against surge.
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6W loss for 18W current draw for a typical magnetic ballast.



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frostier
post Jan 4 2018, 11:49 PM

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QUOTE(mot88 @ Jan 4 2018, 10:41 PM)
6W loss for 18W current draw for a typical magnetic ballast.
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Yes, for 36W Fluorescent tube.
If LED, it's lower... try use the power logger
frostier
post Jan 5 2018, 12:40 AM

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Sorry, i gone through my file. I didn't save the power logging file with retrofit ballast.
However, I can assure you the loss is minimal about 1w
janson_kaniaz
post Jan 6 2018, 09:06 AM

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Good deal

http://www.lazada.com.my/10-pcs-philips-ec...t-26709759.html
frostier
post Jan 6 2018, 09:13 AM

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QUOTE(janson_kaniaz @ Jan 6 2018, 09:06 AM)
Decent.
janson_kaniaz
post Jan 7 2018, 07:27 PM

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Maybe not related to tube but may I know how to differentiate the diameter of the bottom of bulb?

For example based on the photo, the bulb bottom looks quite big and I need the smaller one.

https://www.lazada.com.my/3-pcs-original-ph...1.93223b94DUJuQ
halcyon27
post Jan 7 2018, 07:36 PM

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QUOTE(janson_kaniaz @ Jan 7 2018, 07:27 PM)
Maybe not related to tube but may I know how to differentiate the diameter of the bottom of bulb?

For example based on the photo, the bulb bottom looks quite big and I need the smaller one.

https://www.lazada.com.my/3-pcs-original-ph...1.93223b94DUJuQ
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Read up on lighting fitting types here. That bulb employs an Edison screw type base called E27. What you're probably referring to could likely be E14. These two are common here.

This post has been edited by halcyon27: Jan 7 2018, 07:38 PM
janson_kaniaz
post Jan 7 2018, 08:39 PM

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QUOTE(halcyon27 @ Jan 7 2018, 07:36 PM)
Read up on lighting fitting types here. That bulb employs an Edison screw type base called E27. What you're probably referring to could likely be E14. These two are common here.
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thanks!
sgpdsmss
post Mar 17 2018, 01:09 PM

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previously installed with China T8 18w LED tube ...every time turn on the light ...FM radio straight having shi...shi ...shi...shi..distortion sound....
turn the light off ...the distortion gone.....

try changed the China T8 to Philip ecofit 20w LED tube..
the FM radio distortion gone....even turn on light light..

wonder what different ...China T8 VS Philip T8

thanks ....
danielSinclair
post Mar 17 2018, 01:13 PM

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hi sifus... any recommended shops near bandar baru Bangi?😊 thanks
kmarc
post Mar 17 2018, 01:15 PM

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I just replaced my computer room T8 normal lights with the LED ones a few days ago. It was 2 sets of lights with 2 tubes each. After the electrician finished modifying and installing the lights, it was so damn bright!! I had no choice but to remove one tube from each light and my rooms is still as bright as ever! thumbup.gif

Oh well, I will just keep the 2 new LED T8 for future use.
frostier
post Mar 17 2018, 05:45 PM

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QUOTE(sgpdsmss @ Mar 17 2018, 01:09 PM)
previously installed with China T8 18w LED tube ...every time turn on the light ...FM radio straight having shi...shi ...shi...shi..distortion sound....
turn the light off ...the distortion gone.....

try changed the China T8 to Philip ecofit 20w LED tube..
the FM radio distortion gone....even turn on light light..

wonder what different ...China T8 VS Philip T8

thanks ....
*
That’s the difference with the EM insulation
sgpdsmss
post Mar 17 2018, 06:44 PM

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QUOTE(kmarc @ Mar 17 2018, 01:15 PM)
I just replaced my computer room T8 normal lights with the LED ones a few days ago. It was 2 sets of lights with 2 tubes each. After the electrician finished modifying and installing the lights, it was so damn bright!! I had no choice but to remove one tube from each light and my rooms is still as bright as ever!  thumbup.gif

Oh well, I will just keep the 2 new LED T8 for future use.
*
how many w for your t8 tube ?
Philips or China T8?


QUOTE(frostier @ Mar 17 2018, 05:45 PM)
That’s the difference with the EM insulation
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any way to improve em insulation for LED panel driver ?

Philip T8 solve the noise ...but room LED panel light turn on the noise come back again ...

thanks ....

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