If anyone is unsure of the purpose of the filament, not only does it offer current limiting but it's other purpose is for fast startup times by preheating the mercury droplets that condense on the bulb when it's cold. I have a 850w tanning lamp that has 2 external ceramic heating elements behind the bulb itself, once the mercury vaporizes the lamp plasma arc self-ignites. Very interesting to play with.
Quite a strange lamp. The reflector part is the phosphor, so you get color corrected light. Then you have the pure arc of the mercury going through the clear glass, but the filament compensates by adding more red rich light. I guess overall it must produce a pretty neutral whitee light, with a slight tint of green? Looks like they'd be a good option for a back garden light - the incandescent provides enough light for short duration operation, but the arc tube provides unbeatable brightness for long evenings outside. I would assume that the filament is the life determining factor. What is the average life expectancy of these lamps? It looks like the filament is thick and under-volted, so I'd hope it lasts for a very long time. It would be dissapointing to only get 1 or 2k hours because of a broken filament.
@@DjResRThat's the major drawback of self-ballasted mercury vapor lamps to me... and the reason to choose ballasted ones instead. Or even better, metal halide.
If anyone is unsure of the purpose of the filament, not only does it offer current limiting but it's other purpose is for fast startup times by preheating the mercury droplets that condense on the bulb when it's cold. I have a 850w tanning lamp that has 2 external ceramic heating elements behind the bulb itself, once the mercury vaporizes the lamp plasma arc self-ignites. Very interesting to play with.
Nice!
Its like 3 different lamp technologies in one.
Cool, This type of lamps still manufactured
imagine the cathode 1 and 2 being ike: alright, lets start the arc in 3.. 2.. 1.., lol
Quite a strange lamp. The reflector part is the phosphor, so you get color corrected light. Then you have the pure arc of the mercury going through the clear glass, but the filament compensates by adding more red rich light.
I guess overall it must produce a pretty neutral whitee light, with a slight tint of green?
Looks like they'd be a good option for a back garden light - the incandescent provides enough light for short duration operation, but the arc tube provides unbeatable brightness for long evenings outside.
I would assume that the filament is the life determining factor. What is the average life expectancy of these lamps? It looks like the filament is thick and under-volted, so I'd hope it lasts for a very long time.
It would be dissapointing to only get 1 or 2k hours because of a broken filament.
Yeah usually these do have a 1k hour lifespan due to the filament which means the mercury vapor part is barely aged._
@@DjResRThat's the major drawback of self-ballasted mercury vapor lamps to me... and the reason to choose ballasted ones instead.
Or even better, metal halide.
Note that the glass front actually absorbs much of the deadly in we crave....
u mean UV. inner glass is Quartz and doesn't absorb it
Beautiful wow
Such cool lamps.. Hot would be a better euphemism actually.
Her similar to the light bulb I've got
Richard mau suka lampu ML 750w iya
Дрв это зло -эффективность ниже плинтуса (дрв 250 светит заметно слабже чем дрл 125) да и положение у дрв строго вертикальное