Why Vacuuming and Helium Filing is Necessary for Vintage LED Light Bulbs?
For vintage LED light bulbs, both vacuuming and helium filing is important.
Because normal air contains humidity and other things, for example, the dust, the normal air will change to fog if the vintage led bulb is turning on, because both led filament and power will create a lot of heating, the normal air will change to fog after it is heated and cooling down when the vintage led bulb is turning off, the humidity and dust will adhesive to glass when the normal air inside the vintage led bulb is cooling down, the glass looks not clear, like frosted glass, not much good looking. Also, the humidity and dust inside the normal air will make the led filament and power has a shorter life, because humidity can speed up the oxidation of the led filament. In order to keep the vintage led bulb clean and having a long time period of warranty, vintage led bulbs cannot have normal air inside, and we must remove the normal air by vacuuming.
2. Helium Filling.
Why helium gases? But no other gases like nitrogen? Because we BOFA Lighting Company has done a lot of testing with different gases, the helium is the best for vintage led bulbs.
Helium is a kind of inert gases, no oxidation and other harmfulness to led filament and led power, it is totally clear, no any color, no impurities, and it can keep the vintage led bulbs always in good condition.
Helium can take the heating from both led filament and driver to the glass of the vintage led bulbs. When the vintage led filament bulb is turning on, both driver and led filament will create a lot heating, the helium that is close to the filament led and driver will be heated, the heated helium will rise, other helium close the glass of the vintage led bulb is still cold, so it would go down to the bottom of the vintage led bulb where the led filament will warm up these helium, in this way, the helium flows in a circle inside the vintage led bulb, and takes the heating to the glass of the vintage led bulb, the glass will transmit the heating outside of the vintage filament led bulb, to the air. So the helium is a very efficient heat sinking material.
Vacuuming and Helium Filling
Both vacuuming and helium filling is done vintage led lamps by one machine. Vacuuming is first, vacuuming takes about 5 seconds, and vacuum standard is -0.1pa. And then it is helium filling, to the standard atmospheric pressure. After filling helium to vintage led lamps, we test the vintage led bulb with high voltage vacuum testing machine, if it is light orange color light close to the base of the lamp, then it is ok, otherwise, it is not ok, for example, there is no light, or any other light close to lamp base when we are doing vacuum testing with high voltage vacuum testing machine.