How to calculate how many number of lights/lumen/wattage needed for a living room?

Size is 10' width by 20' length, ceiling height is 9' . Window 6' wide by 4' height north facing.

Thank you

Best video so far that extra explained this. I was confused with so many methods. Turn out there is two type of LED tube, double sided and single sided. Then two type of tombstone, shunted and non shunted

Each one connect differently

Old thread, but what happens if
the starter is left in, or one forgets
to take it out ?

It may damage the LED tube if a flourescent starter still left in coz the starter for legacy flourescent boosts the voltage higher.
Not to mention waste power to power the flourescent starter, and also if you have an old choke (ya those heavy bricks).

Nowadays T8 casing is dirt cheap, should use a new LED casing (sans starter type).

Thanks for the information.

my philip ecofit tube totall no light up now ...

plan to change normal led t8 tube 30w ..
wonder how to wiring need to be connect using phili ecofit casing?

i plug china led tube into philip ecofit casing its broken the 13amp top plug fuse after switch on ..wonder the tube still function or not..

thanks...

This post has been edited by sgpdsmss: May 16 2021, 09:30 PM

Can consider to just change the whole thing to LED linear batten e.g.
https://shopee.com.my/Philips-Essential-Sma...6980.6258783273 (4000K) or
https://shopee.com.my/Philips-Essential-Sma...6980.4858782596 (6500K)

Just hook up the power 2 wires and 2 screws for clip mounting, ta-dah.

erm...........

i assume you left the philips "starter" in the lamp housing while testing the china led tube right?

philips ecofit lamp has the positive and negative terminal on the same side. the philips "starter" function is to change the lamp housing one side positive, one side negative to one side with positive and negative.

the china led lamp most likely is has the terminal one side positive, the other end negative.

so using it with the philips starter, you shorted positive to negative directly.

so,

1. the lamp housing should be ok.
2. i am guessing the china led is still ok.
3. you may test after changing the 13 amp fuse, and take out the philips "starter" and test the china led light.

does it more brighter compare to philip ecofit 20w?
will lizard play around at the casing?
current traditional casing ..lizard like to play around and dirty the casing..

nope starter on the housing..the housing was slim type that come together with the philip ecofit tube ..just plug n play ...

how to wiring from philip ecofit housing to suite china led tube?

thanks ...

Basically there are 2 types of T8 LED Tube in the market:
1) Single Ended
2) Double Ended

All Philips/LEDVANCE (OSRAM)/GE/OPPLE (1 of the series) are single ended.
Most if not all China branded LED Tubes are double ended.
Both requires slightly different wiring.

then dont do the wiring, just buy those led where the terminals are at the same side.

look at the electrical diagram........usually printed on the led light.

how to differentiate single ended vs double ended without seeing the brand ?

china tube just tube only no showing wiring diagram i think ...

thanks ..

Good question, I didnt know as well, there is such a difference. When I bought mine, the seller just said, remove the starter and and slot the LED.

Googling it, says,

single ended has Live and Neutral at the end of the tube



whereas double ended has Live on one end the neutral at the other end.



https://www.energyfocus.com/blog/single-end...ended-led-tube/

Looks like, mine is single ended then.

Getting LEDs, do not refer the Power Ratings (W). Focus on the lumens output instead.
Eg Philips ECOFit comes in 2 different package. Using 4' as as example:

1) Standard Output- 18W = 1,800 lumen
2) High Output- 20W = 2,100 lumen

There are some more higher end models under the Master series:

1) Standard Output- 10.5W = 1,600 lumen
2) High Output- 14W = 2,100 lumen

The Master series are rated for 50K Hrs lifespan.

You can see how the connection are made to the tube. Double ended T8 LED tubes have L and N on opposite ends.

still cannot know single ended or double ended if no marking L and N

previously using philip ecofit 20 ..should be 2100 lumen ..
still felt not brighten...
plan to get those china 30w led tube ..supposed should be brighter?

dismantle the end cap to see either single ended or double ended connection ?
mostly tube no marking L and N on the end cap right ..


thanks ...

can see the lizard signed on the tube housing...haha..


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this is double end.
look for the wiring diagram...........it is always available on the led light.

China 30W? What is the lumen output?
If not sufficient why not go for those 2x fittings?

Most if not all China rated lumen output drops significantly after 1-2 months of use. Just visit any Mr. DIY shops and you will know what I mean.

mine no indication the wiring diagram..


it's say 2500 lumen ..

2x fitting ...if 1tube 20w total will be 40w...

this 30w RM10 per tube ..



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