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| Clarification of Mercury Ballasted lamp types http://ukastle.co.uk/discussion/viewtopic.php?f=5&t=763 |
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| Author: | MACH1 [ Sat May 30, 2020 6:09 pm ] |
| Post subject: | Clarification of Mercury Ballasted lamp types |
Can anyone clarify for me the difference between Merecury Vapour lamps (125W) bearing the following labels: MBU MBF/U MBFR/U? In particular, I am interested if there is likely to be any differences in their lighting spectra - or if they are intended to be operated using different ballast units. Many thanks. |
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| Author: | Phosco152 [ Sun May 31, 2020 7:45 am ] |
| Post subject: | Re: Clarification of Mercury Ballasted lamp types |
I haven't heard of the MBFR/U classification but the other two are both commonly used. MBU refers to mercury lamp without a fluorescent coating, these tend to produce a more blue /green light. MBF/U refers to a mercury lamp that has a fluorescent coating on the inside of the outer bulb. The coating converts some of the UV light into visible light, producing a whiter light than MBU types. They can both run on the same gear. More info here. |
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| Author: | MACH1 [ Sun May 31, 2020 9:21 am ] |
| Post subject: | Re: Clarification of Mercury Ballasted lamp types |
Thank you for this clarification. I had suspected that the F might possibly be associated with some kind of spectral shift by the addition of fluorescent material to the glass envelope. I use an MBU lamp in a moth trap - and noted that the newer replacement lamps I have are all marked MBFU - so they will actually not be as effective I suspect, as moth's visible spectrum is in the UV. |
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| Author: | sotonsteve [ Sun May 31, 2020 1:10 pm ] |
| Post subject: | Re: Clarification of Mercury Ballasted lamp types |
The "R" indicates a reflectorised lamp in the form of a spotlight-shaped lamp. |
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