Fluoresent or LED

[ericmark]

Well the facts are LED tubes give less light than florescents of the same size. Just look up the specs. But old florescents can be dim especially if you have never taken them out and cleaned them. The same thing will happen with LEDs if you don’t clean them.

You can get LED tubes with same output as fluorescent, however not it seems in high street shops, but I when replying to another thread found “According to the UCC, you must support products for a minimum of seven years after last customer ship!” so we should be able to get replacement tubes for some time. Remember a LED tube will not work in a lamp with an electronic ballast.

 

[winston1]

You can get LED tubes with same output as fluorescent, however not it seems in high street shops,

Do you have a link for such tubes?

 

[RandomGrinch]

Do you have a link for such tubes?

4000 Lumens at 24W is pretty respectable:

5ft 24w LED Fluorescent Tube - Daylight - 4000 Lumens | LEDlite (LTT524HDL)

A typical fluorescent tube may be 5000 Lumens, at 58W.

 

[Taylortwocities]

4000 Lumens at 24W is pretty respectable:

5ft 24w LED Fluorescent Tube - Daylight - 4000 Lumens | LEDlite (LTT524HDL)

A typical fluorescent tube may be 5000 Lumens, at 58W.

Given your information that makes the LED bulb at 167 lumens/watt and the florry only 86 lumens/watt.

But that means that most of Winston’s posts above are wrong.
Or is my calculator broken?
Gulp. Stop the press. It’s the end of days…

 

[ericmark]

Since in the main the tube is fitted without removing the magnetic ballast the 50 watt version is normally sold as a complete lamp the one linked is 4150 lumen which for 50 watt is not very good.

This one however 6000 lumen and this is the problem, LED lamps vary hugely as to how efficient they are. With a GU10 at 2.8 watt be it 365 lumen (note 10 - 30 volt this one) or 2.5 watt[/URL]
[url=https://www.diydirect.com/gu10-15-led-bulb-2-5w-warm-white?gclid=Cj0KCQiAvqGcBhCJARIsAFQ5ke5TKHM7JuBD8bd1eM-ks64kiAHLhmD47KSP9JPsfJcHQXS2hMDNZmUaAsVbEALw_wcB]at 200 lumen [/url]it hardly matters, but we have had it drummed into us LED is efficient, and some are, but also some are not.

 

[winston1]

Given your information that makes the LED bulb at 167 lumens/watt and the florry only 86 lumens/watt.

But that means that most of Winston’s posts above are wrong.
Or is my calculator broken?
Gulp. Stop the press. It’s the end of days…

My posts are not wrong. So a non typical tube has turned up which claims an unusually high output.
Manufacturers have made false claims before though I am not saying this is a false claim. I would like however to see evidence of this rather unusual claim.

 

[RF Lighting]

You never provide evidence to back up any of your unusual claims.

 

[winston1]

You obviously don't read all my posts.

 

[SUNRAY]

Since in the main the tube is fitted without removing the magnetic ballast the 50 watt version is normally sold as a complete lamp the one linked is 4150 lumen which for 50 watt is not very good.

This one however 6000 lumen and this is the problem, LED lamps vary hugely as to how efficient they are.

As it happens I have 4 of the 300mm version https://www.mygreenlighting.co.uk/b...V_aPXOl6LbIWkEOsTxV8ujSvCEqq8RZkaAmy8EALw_wcB which were quoted as 980 lumen, however I see the later versions are quoted as 1200Lumen, which I purchaced to install three in a 9ft x 9ft fibreglass hut to replace the 4ft 40W ballast fitting (that's a ballast from when ballast meant 4 terminal unit and not choke - 2 terminal). containing a tube of 40 years old and in the 5th location - it was a scrap unit from work, used in my workshop 1985- 1991, garage 1992- 1994 next workshop 1994 - 2009, hut 2009 - 2021, dates approximate.

2 weeks later they were replaced with a new 1200mm fluo. The main complaints were the glare of the 'point source' fittings in a ceiling height of 2m and the shadows. However the perceived light level; initially there were not really any comments but the replacement 36W fluo was instantly seen as brighter (not surprisingly) and changed for a warmer colour.