Then, yes, it may seem expensive: 4 bulbs 28 but reduced to the quality of these bulbs, it's nothing at all.
For that price, you will have 4 bulbs each carefully packed in its box and the bulb itself protected in a plastic shell. This is serious at the manufacturer level.
I was very surprised by lighting my lamp because the light is a beautiful yellow and not white like the time of filament bulbs. And yes, I regret with LEDs, the white, the color is too white, light bulbs are long ignition. Here, the point of all this, the light is instantaneous, sweet, yellow. Besides, this bulb is equivalent to a 40W bulb. Or 350 lumens for modern.
Then, the manufacturer promises a lifetime (or lighting 15 000h), you will understand that I did not test, but back in the day it's 625 days (24/24): it's just huge. And that for only 7 per bulb.
In conclusion, I was very pleasantly surprised by these bulbs I received for testing. I keep in mind the brand to buy other bulbs home and have equipped all my small screws lamps.