led gu10 problems

[Steve]

If you want to compare these lighting technologies:

normal bulb - 60W

Yes, correct, this is spread very nicely round a room. One 60w lamp can light an average bedroom nicely.

Halogen - 50W

Lumen output may be as per 60w tungsten filament, however, you need a lot more of these to light the same space as a 60w TF lamp. Typical wattage in a bedroom, 200w.

CFL - 11W

Yes, ok, a BC/ES CFL at 11 watts will kick out about the same lumens as a 60w TF lamp, and spread it around the room nicely. Typical wattage in a bedroom 11 watts.

LED - 5W

Now this bit, I really must contest. A 5w LED lamp will not illuminate a room in the same way as a 60w TF lamp. As with halogens, you need a lot more of these to light a room. Typical watts for a bedroom: 20-30 with current technology.

 

[aptsys]

LED - 5W

Now this bit, I really must contest. A 5w LED lamp will not illuminate a room in the same way as a 60w TF lamp. As with halogens, you need a lot more of these to light a room. Typical watts for a bedroom: 20-30 with current technology.

That's quite a sweeping statement though and is highly dependant on the optics used. Where the LED is used with a collimator as many of the types sold to the average joe are, then I'd agree, but then you wouldn't choose a single 5W 'lamp', you'd go for multiple lower output LEDs.

Fill a ceiling with 100 PLCC-2 white LEDs it may be brighter.

 

[ban-all-sheds]

It's a dead-end technology, basically, and will be dropped by the makers as soon as something else (e.g. OLED, ESL) is available.

Semiconductor LEDs most definitely aren't a dead end technology.

OK - let me rephrase that.

Semiconductor LEDs are a dead-end technology when it comes to making replacement lamps with sufficient light output and suitable beam pattern and colour temperature to be used for general domestic room illumination.

 

[aptsys]

It's a dead-end technology, basically, and will be dropped by the makers as soon as something else (e.g. OLED, ESL) is available.

Semiconductor LEDs most definitely aren't a dead end technology.

OK - let me rephrase that.

Semiconductor LEDs are a dead-end technology when it comes to making replacement lamps with sufficient light output and suitable beam pattern and colour temperature to be used for general domestic room illumination.

That's better

 

[ban-all-sheds]

you wouldn't choose a single 5W 'lamp',

Err - that's just what all these misguided fools buying MR16 LED lamps are doing.

you'd go for multiple lower output LEDs.

Fill a ceiling with 100 PLCC-2 white LEDs it may be brighter.

It'd be a pretty small ceiling if you could "fill" it with PLCC-2 packages, or are you proposing to light a room (INCLUDING THE WALLS, NOT JUST THE FLOOR, REMEMBER) with 100 tiny points of light about 1' apart?

I think I'd want to see it working to be assured that:

a) it didn't look sh**e

b) it did actually work.

In the meantime there are other ways I'd rather build a luminous ceiling, e.g. dielectric barrier discharge panels.

 

[aptsys]

e.g. dielectric barrier discharge panels.

And fill the room with ozone at the same time?

I only suggested PLCC-2's the viewing angle is usually 160 degrees, so would illuminate walls and floor.

 

[ban-all-sheds]

Ozone?

Doesn't seem to be a problem with the millions of LCD displays out there....