GE seemingly has removed the A-19
bug lights from their web. This I would assume to be the one we are discussing and the brand normally seen.
Still on the
PAR 38 HIR, it notes “a special coating that makes light invisible to bugs, so they stay away.”
Also a specification of yellow finish, and a more rugged lamp for environment extremes.
Phillips still offers a classic
bug light on the website - just takes an advanced search to find it.
“Yellow light that is emitted does not attract insects. For use in protective outdoor fixtures or in enclosed porches.”
Same yellow finish and as above a theorized to be more of a rough service lamp.
On the Phillips lamp, it’s noted that no luminous output or even lamp life is specified.... suppose stuff like that don’t matter. Kind of hard to compare/contrast a
bug light with a yellow lamp short of any data. The GE specs didn’t matter given it was a
PAR not a 100w A-19
bug light lamp. If I check an old GE catalog I’m sure I could pull them up - if any but for now, on with the research.
Onto Osram/Sylvania.
Same basic 100w/120v
bug light as Phillips sells and GE at least used to and probably still does.
Aluminum
base which is more info than the others note but not a lamp
base material normally associated with a outdoor lamp - brass normally I thought.
We have a
color temperature specified 2,850̊K = something you won’t normally find specified on a colored lamp such as our yellow lamp.
Lamp finish is yellow
Curious that the
CRI is 100, my suspicions will have been a little less.
Lamp life 1,000hr not great, cc-8
filament which is good.
No luminous output stated. See below for the further documentation of the
bug light lamp which makes this website - once you get to the correct section of it, very useful.
First a side
line onto the yellow non-bug light lamp. Osram while on the website doesn’t offer a 100w version - that’s a GE thing. Still in general description it that the inside
frost - yellow lamp is also a
bug light. “
Incandescent A19
Bulb Shape Yellow
Bug Light Medium Aluminum
Base 60
Watt 130 Volt Retail Pack 24 Bulbs Per Case 2 bulbs Per Package.”
Very curious that the yellow lamp while not listed as a
bug light lamp under the description is a
bug light lamp. Is the blue lamp than a UV lamp, or perhaps red lamp also a
bug light lamp?
Same
color temperature and
CRI. Same
base type and
filament type. Same finish and same lack of lamp life and luminous output listed. Really, in spec, other than 60w instead of 100w, it’s the exact same specification between a “Yellow” lamp and a “
Bug Light” lamp. Family brand name is also
bug light. I’m thinking this is a typo on Osram’s part.
Let’s head back to GE for the colored yellow lamp. Websites stink at times.... No, we don’t want the transparent yellow “Party
Bulb...” Nor a
fluorescent lamp. Gee, I’m lost in knowing a lamp exists yet can’t find it on the easy to find website. I’ll do an advanced search for the 100w A-19 version ... down to 168 lamps... down to 7... must be discontinued or not on the website - hard to tell when they remove discontinued lamps while not always listing all lamps. Short of looking up the part number such as 41291for a 100A/Y that no longer exists at least on the website... you out of luck. Time to try the 60w version... 60w don’t exist either. Can hold a lamp
in one’s
hand, yet it don’t exist. Now giving up on the GE website after doing a further search for the A-21 version.
Back to the Osram/Sylvania website to the really useful info - the further readings.
Lots of documents on the technology of this lamp including “Entertaining with Light” where it says “Not to be confused with
bug light “zappers”, these lights are actually designed to deter bugs by giving off a light that does not attract them.” “
Incandescent Specialty Lighting” also says the same basic thing.
Ever read a
MSDS on a A-Lamp? Really interesting.
Real meat is in their free PDF Engineering Bulletin “
Incandescent Technology.” This one only 11 pages but still a must read. All you ever wanted to know about a lamp and more than Ship knows or at least expresses - also in a easier to read format. Like their “low
voltage halogen...” and other manuals, it’s the nuts and bolts.
http://dafnwebpd.sylvania.com/os_fi...dth=600&hgth=450&Desc=Incandescent Technology
Note: it’s an “inert gas” not a noble gas as an important term for those doing the figuring of what makes up a
halogen or
incandescent lamp in gas. Also gets into stuff like “osmium”. “
Tungsten has the lowest vapor pressure at elevated temperaturs and the highest melting
point (3,655̊K) of all metals. This combination of properties is desirable since low evaporation rates premit extended
filament life while high
filament temperatures result in high
lumen outputs and efficacies (LPW.) Relatively,
tungsten wire has great strength and is very durable when operated near its melting
point. The variation of
lumen output and
efficacy with
filament temperature is shown in Figure 2.”
Test question... what’s osmium and why is it important in lamp technology?
From this paragraph, we learn that the higher the
color temperature of the
filament - or closer to it’s melting pint - a specified
color temperature, the more luminous output and efficiency in lumens per
watt, but less lamp life.
Halogen lamps that can operate at a higher temperature due to replentishing are more energy efficient. Xenon lamps such as the EVC that operate right near the melting
point are the most efficient but won’t even with the
halogen effect assumed to also be a part of the lamp, have a long lamp life unless you lower the output/
color temperature.
The Fig.3 drawing of the difference between a type c and a cc
filament better explains the “coiled coil”
filament concept better than any other I’m aware of.
Also following other discussions about the glass making up a
bulb,
page 6 has the expiation of Soda Lime (soft) glass, HRG/Borosil,
Pyrex, Fused Quartz (as different than
Pyrex and I believe a GE/Corning product) and Hard Glass.
Important note about a 35% loss in efficiency by way of using “
daylight” lamps such as say a “
Reveal” by GE or similar from all brands you won’t read in the advertisement. This given that there might be other energy efficiency boosts to the lamp design to compensate in use.
Details about Krypton and other gas fillers - what they do - say the purpose of nitrogen, and corrects a misconception about bromine gas filler I had in thinking it one of the inert gasses, much less it’s extent in a
halogen lamp as the wattage goes up over that of iodine.
First I have ever heard of the concept of “Water Cycle.”
Less than 5% of the lamp’s output is in the 350 to 420nm range - but it is there. If it's there, perhaps the errent Moth in attempting to fly to the Sun and find the fire spirit is seeking out not the light but the heat. Than again it could just be the light of a certain blue/white instead of amber white coloring.
Do moths get attracted to
fluorescent lamps? Just a side thought. In changing lamps to a ceiling
fixture, one will often see flys inside a
reflector, but never a night time moth. Do flys and Moths have a seperate spectrum of light they are attracted to? Mosquetos smell blood but
bug zappers in theory also get them.... Lots of science questions here.