I will take their specifications with a pinch of salt.
If you have a lux meter only you can tell whether it is degraded (less lumen output) over time.

Your choice, I will always stay clear of these "overclaimed" specifications and stick with reputable brands.

i no have lux meter..
how long can be degraded?

reputable brand like philip?
1pc philip ecofit 20w down in 2years time ..

Reputable brands like Philips/LEDVANCE(OSRAM)/GE have at least 2 if not 3 ranges:

1. Consumer (10-15KHrs)
2. Retail/Commercial (20-30KHrs)
3. Professional (>50KHrs)

Only specialize shops can you find option 2 and 3. All shops you can find option 1 (which is fine for most application).
For me my own home, I always go for option 2 or 3 series and skip as much as possible option 1 as I am very lazy to change the tubes/bulbs and I intend to stay in my house long term.
Rule of thumb for most residential we use a 6Hrs utilization per day.
Hence Philips ECOFit (15KHrs) is supposed to last about 7yrs.

Reputable brands follow a L70B50 specifications, meaning to say even an ECOFit is rated 15KHrs, the lumen output cannot drop more than 30% of the rated output. Otherwise it is considered to be "faulty" even though the entire tube is lit up.

Try asking China brand for L70B50 specs!

2500/30 = 83L/watt.

2100/20 = 105L/watt

Look like Philip more efficiency per watt lumens deliver.

My office is using ecofit for 3yrs already. Not much lumens reduce.

My home also using ecofit. Replace the old T8. Lumens reduce to compare.

delete.

This post has been edited by ozak: May 18 2021, 08:52 AM

could be installed in shower room to shortage the life spend?

your office is under air-conditioning environment...so may last longer ?

thanks ...

8hr run with aircon.

My home dinning and work room also using ecofit. no aircon. About 3yrs too.

This post has been edited by ozak: May 18 2021, 12:10 PM

Yes, using lumen/W is a more accurate measurement of any LED light.
Latest model of Philips Master series only requires 12.5W to produce 2,100 lumen (168 lm/W).
Even the recently soon to be phased out 14W is rated 150lm/W.

As long as the ambient temperature is lower. the lifespan of any LED is longer.
Anyhow, Philips LED are rated for their system lifespan. Some brands quote 50KHrs but is actually the LED chip lifespan and not system (with driver/Power supply).

yours so tahan...

what's the price for philip master series ?

mine ecofit ....1 long tube separate into 3 parts ...1st part initially keep flicking ..after some time 1st part become black ...2nd part ..3rd part still light up ...after few days llater 2nd part black out ..leave 3Rd part ...after again ...whole tube black out ....

Philips Master usually around RM 50++. I have been using them since the days it was 16W, then upgrade to 14W and now 12.5W. All also 2,100lm for 4' model.
Problem is my 16W not spoiled yet after 6 years in use.

Color rendering should be good enough

Wanted to ask which T8 LED that does not need starter?

Because I saw Philips MASTER has one kind of starter:
https://www.lighting.philips.com.my/prof/le...9902_EU/product

My current T8 LED tube is from GE, and does not have starter.

If u're installing a double sided T8 LED tube to a fluorescent casing, u need to replace the normal starter to a EMP starter, that's how the whole circuitry works.

If the casing is dedicated for LED tube, there's no starter required. Just must note if the casing is single sided or double sided & buy LED tube accordingly.

My T8 casing is single sided.
How do I differentiate the T8 tube is single sided or double sided?

Single sided means one end is L, one end is N. Cannot reverse.

Double sided = both side 1 pin L 1 pin N.

I know about this, I just want to know if the manufacturer has put anything in the spec that identify the tube is single sided or double sided?

refer to my post #273. Im using single ended, hence, i just pull out the started and plug the tube, thats about it.

https://forum.lowyat.net/topic/4178568/+260#

Sorry guys if I hijack this thread with LED T5 stuff.

I am planning to put LED T5 for light through plaster ceiling. It will be L-shaped, pointing towards the wall and rough estimate around 30ft which may need 7-8 pcs of 4ft LED T5.

So my question is, can all this 8 pcs of LED T5 connected to each other and 1 end to be connected to the light point wiring?

I saw some shop in shopee saying there is max connection of 4 - 6 pcs per point. When I asked one of the seller, he said need to do closing which I don't understand what he really means.

single sided = all china tubes .

double sided = philip ecofit tube n others brand.

am i rite?

single sided cannot reverse meaning the tube will only light up in 1 direction depend on which side is L?

thanks ...