Strip lights

[fixitflav]

That is true for the vast majority of "white" LED lights in which the LED element ( or die ) produces blue or UV to energise a phosphor.

However white ( full spectrum ) light can be produced without the use of phosphors by using elements which have 3 or more sources merged into a single die.

One approach to fabricate white-light LEDs is to combine devices of different materials, where each material emits a different color. The emmision of red, blue and green from the different materials can be combined to create white light, but this increases the complexity and cost of manufacture of LEDs. Alternatively, a single semiconductor can be used by mixing in a phosphor that absorbs some of the light emitted by the semiconductor and then re-emits it as a different color. However, phosphor degrades over time, limiting the useful lifetime of these devices.

OK, are these improved types available?

 

[SUNRAY]

The light spectrum that LEDs create is not created by the LEDs at all - it's created by the phosphors that are used over the LED die.
Just as fluorescent tubes use phosphors to convert the UV light into visible.

If the light output is not what is required then it's entirely the fault of those manufacturing them using the wrong mix of phosphors.
Yes - some LED lights are terrible. Just as some fluorescent efforts were also terrible.

Again another blanket statement from you which I find quite hard to accept.
If the Choice on some LED lighting is so bad, surely the manufacturers would know that and certainly would be listening to the complaints and spend some R&D time and money on it to put it right.
As I've already mentioned a number of times in this forum; I've been involved with restoring from the 'lovely new LED lighting' back to fluo and even incandescent for customers so they can continue working.
The church hall I've mentioned (and another I've since become aware of) is still being financed by the diocese where it was fully self funded by regular bookings which they now struggle to keep and solely due to the change of lights, there has even been suggestion of selling the the 'another' hall for residentual developement because of it.

As Bernard has mentioned the LED phosphors degrade and fairly quickly as can be seen where the same fittings have been installed in different areas and those used more frequently soon change colour, far more rapidly than fluo ever has.

No I know not all LED lighting is unacceptable, for a start theatrical/stage lighting has come on leaps and bounds and the technicians love it. However the marginal reduced cost of energy will never outweigh the huge cost of purchase and replacement.

 

[flameport]

certainly would be listening to the complaints

You and that church hall seem to be the only one who has these complaints.

Millions of buildings all over the world have had LED lighting as standard for years. Millions of complaints are not occurring.

 

[bernardgreen]

OK, are these improved types available?

yes but cost is higher.

Millions of buildings all over the world have had LED lighting as standard for years.

Many people have LED lighting because incandescent lamps were outlawed for domestic use.

 

[SUNRAY]

You and that church hall seem to be the only one who has these complaints.

Millions of buildings all over the world have had LED lighting as standard for years. Millions of complaints are not occurring.

Only because nothing else is available... and I'm not the only one on this site saying LED is not as good as other systems.

 

[morqthana]

yes but cost is higher.

Many people have LED lighting because incandescent lamps were outlawed for domestic use.

No - they were outlawed for sale, not use.