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Halogen ballasted mercury lamp full power Here's the lamp at full brightness. Now the mercury is very dominant, but the halogen still provides enough light for colour rendering. The combined colour temperature is between 4000 and 5000K. My energy monitor showed that at 241V, the lamp pulled 291W and 1.26A with a power factor of 0.96. Which makes me question whether it is truly a 250w lamp. On the whole, I'm rather impressed with these lamps. I wouldn't want to test them in actual street lighting, but as a novelty I quite like them. Keywords: Lamps

Halogen ballasted mercury lamp full power

Here's the lamp at full brightness. Now the mercury is very dominant, but the halogen still provides enough light for colour rendering. The combined colour temperature is between 4000 and 5000K. My energy monitor showed that at 241V, the lamp pulled 291W and 1.26A with a power factor of 0.96. Which makes me question whether it is truly a 250w lamp. On the whole, I'm rather impressed with these lamps. I wouldn't want to test them in actual street lighting, but as a novelty I quite like them.

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Filename:1000044871.jpg
Album name:AgentHalogen_87 / Industrial lighting
Keywords:Lamps
Filesize:291 KiB
Date added:02 Nov 2026
Dimensions:3072 x 1382 pixels
Displayed:14 times
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1446
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Lamp
Lamp Type:MBH/U? 250
Filament/Radiator Type:Mercury vapour

Comment 1 to 6 of 6
Page: 1

Ria   [Mon 02 Nov 2026 at 18:51]
Looks like a 125W arc tube to me.
Sammi   [Mon 02 Nov 2026 at 18:53]
You can't get much betterer than 0.96 PF.! Tubular MV Cool
AgentHalogen_87   [Mon 02 Nov 2026 at 18:56]
Thanks, with only owning coated lamps it's hard to tell Razz
0.96 is very impressive, with no capacitor in the circuit either!
Drew   [Tue 03 Nov 2026 at 02:23]
These are so incredibly cool! I really wish halogens were used in SBMVs earlier, I think it would have made them slightly more popular. They look cooler too in my opinion. I'd expect to see some interesting color effects from the ground, assuming the halogen and MV light is unevenly distributed which it looks like it would be.
Max   [Tue 03 Nov 2026 at 06:47]
This particular lamp design could certainly have been used much earlier in commercial lamps since it was first developed in the early 1960s, but that was not produced by any of the main lamp manufacturers possibly because of cost-related issues. A lack of color homogeneity in the projected beam is also an obvious issue with this concept as the picture above clearly shows.
AgentHalogen_87   [Tue 03 Nov 2026 at 23:01]
Drew - I wish self ballasted lamps in general were more common. There certainly was an interesting colour shift depending where in the room I was.

Max - It is unfortunate they weren't that popular. It would have been interesting to know how coated versions would perform It kind of depends on where the factory set the cap. On one of the lamps when I screw it in I can get the mercury tube to sit directly above the halogen in the reflector, so an even distribution could be attained. But who would really put enough effort in to do that? Just whack the lamp in and away you go. The seller market them as a grow lamp of sorts which the lamp is better suited to as distribution isn't that important there.

Comment 1 to 6 of 6
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