See here:

http://www.solidstatelightingdesign.com/philips-partners-city-dubai-create-200-lpw-filament-led-bulbs/

Look at all those LED filament bars. Can't be that cheap to make.

Actually they can - that is the thing with semiconductor production. Once you can make one it does not cost the same effort per piece to make many more

What they optimized there that gave the nearly double boost in Lm/W ?

Actually they can - that is the thing with semiconductor production. Once you can make one it does not cost the same effort per piece to make many more

What they optimized there that gave the nearly double boost in Lm/W ?

The filaments are probably underdriven giving them higher efficiency (that is why the L-prize lamp claimed to be so efficient)

At least they are still normal light bulbs, not a plastic and metal electronic gadget shaped like a bulb.

The LED can be only so much (to a limited extent) efficient at low driving current. Any higher efficacy means that something in the building of the LED is changed

There are users who find the "gadget lamps" appearance cool, so why not. And in many luminaires the lamp is behind frost/opal/"dirty Glass" (by design) diffusers so the light and dark sides of the "gadget lamps" are smoothed out by the lumianire. There a cheaply built "gadget lamp" would have cost advantage over filaments that nobody can see

What interests me is - In this lamp the efficacy is good, the distribution is good, but what about the spectrum ? Is that any changed vs. the usual LED lamps ?

How are standard gadget LEDs cheaper than filament LEDs? The latter is lightweight, has no expensive heat sink, are getting easier to manufacture, etc.

200 lm/W is impressive yes, but note how they stop at 3 watts, (and again 600 lumens)!, the limit of their cooling effectiveness?
I want to see a 200 lm/W, 35watt, 7000 lumen lamp that really can replace HPS/MH, then I will be proper impressed.

To make the filament LEDs there is need to poeition and weld the filaments and all the Glass work to make the lamp. The "gadget" things construction is much more crude, in its basic shape just some Plastic injection moulded and Aluminum extruded/cut parts clicked together. It is lower tech product which means that more companies with less advanced manufacturing technology can make it

So you mean that standard LEDs will stay and filament LEDs are just a small novelty that will be used in just a few sockets?

What about heatsink based LEDs that look like filaments? Those already exist.

wattmaster they are called apple lamps. I've seen them.

Ash, walmart recently switched to new LED filament candles on the store shelves and they are nearly half the price of the heat sink based ones they replaced. So yes they are cheaper.

There are many other things that affect the sale price they slap on things in Walmart. In another shop it will be opposite, so what then ?

What do you think the future will be? You think LED filaments will be the standard or they are just a fad, a gimmick?

Standard, but not be the only type available