did some study (again...) here is the questions I had to my Ushio rep.
So on
line I have been made aware of the new SPH 575/115v lamps. Informed on-line about a new lamp before me in having thought to have signed up for the Ushio news letter and also at times getting samples of new lamps to
play test - knew about such a lamp. Really hate when either
production manager or customer informs me of a lamp before I had a chance to study it. Any chance I can be verified to be at least in the loop for press releases I believe I already signed up for? :<
A few questions on my part came up about this and the Ushio GLC lamp which does not fit into my lamp specs chart of all lamps correctly next to the other GLC/FLK lamps in their catagory.
First on the Ushio GLC, it says that it is a 600w/115v lamp, than other notes I have say it is a 575w/115v lamp. Is this 600w a typo given all other
ANSI GLC lamps on the market are 575w/115v and a different Ushio spec says it is allso 575w or is it correct that it is a 600w lamp and more the reason the Ushio lamp has much better luminous output than any other brand - or at least not by much in that balance of
color temperature and luminous output but given the wattage boosting the output also? (Side question, does Ushio still sell the HX-800 and HX-801 or have they complied with in lamp the GLD/HX-754 and GLE/HX-755 in it being 750w/115v? Or altogether discontinued?)
Second, what is the
filament size on the SPH lamp? (I note this specifically missing from the lamp specs and a very important measurement to declare in modern days just as important as cc-6 which tells
filament support and double coil info but not
filament size.) A Philips GLC lamp (c-13D
filament lamp) for instance measures 9x7.5mm, and from what I can tell by way of Ushio's
line drawing it is 14x6mm, +/- 1mm.
Filament size is incredibly important in
point source or at least square
filament directed light efficiency over at times bulk/wide
filament output especially for
gobo projected patterns. Would the SPH be more similar if not worse than the GLC and HPR (below) in projecting patterns in a third generation
Leko given what the expected
filament size is, or is there something about the lamp which would make for better
pattern projection than either of the above given comperable high output lamps?
What given a normal GLC lamp has a c-13D
filament and the SPH lamp has a cc-6
filament would be the problems and or benefits of both types of
filament - single verses double coil and or
filament hangers in both instances? How does the cc
rating of the SPH lamp lead to the advantage given a double coil but less
filament hangers or coils in a smaller cubic area? (Perhaps bringing back Dr.
Bulb from the olden days of Ushio can help further educate me into understanding these concepts - miss lamp education classes. More refined, is
filament spacing a limitation in making brighter source lamps for directed light fixtures but not as much for
wash fixtures, and this transverse (or trans
axial)
filament the reason why it is more efficient than a GLC and theoretically the same or better than a FLK in a
wash type
PAR fixture? Sort of understand how this trans
axial filament in a
wash type
PAR or even
fresnel fixture could be the case, but in advertising the transverse (trans
axial)
filament in being different Ushio in advertising should better have explained the principal of why.) What optically about moving the
filament by 90 degrees makes this lamp more efficient in a
PAR fixture?
I'm noting in the literature that while the
filament is designed for beam uniformity and a smoother field, it is not as much recommended in advertising for
Ellipsoidal Reflector Spotlights as opposed to
PAR type beams of light. Is this a factor of the above
filament size in noting it being larger or for other reasons such as in-line and spaced instead of stacked/staggered
filament or even
filament grid type closer
filament cross sections?
What is it about the lamp which gives it 20% more output than GLC lamps (including Ushio's own) which given it's transverse
filament makes it more efficient in both luminous output and
color temperature than most if not all lamps? The details on the cut sheet don't explain why given a transverse
filament it is giving a more intense light source, can I get further details on this? How at also 15 to 20% more output does it compare to the Osram HPR 575/115v lamp with its interior
reflector (15 to 20% more output as advertised in output after the overall lamp specs) - this given a FLK
base to the lamp design
filament to the HPR is a problem for
point source of light, but a internal
reflector that completes the ellipse of the fixtures
reflector does help and a even if FLK
filament smaller than the SPH at 6.35x11.68mm
filament how does the SPH compare to this lamp in both the
Leko and
PAR type
fixture? I have seen/
play tested that the HPR in in many ways out-punches a
HPL lamped comperable
ETC S-4
fixture in a
Leko if not
PAR type
fixture (un-tested) and a GLC lamped
Leko by way of at least flatter field, would the SPH lamp given it's expected more output be expected to out
power both the HPR and
HPL in the same way of flatter field and more punch or just that of the GLC in overall punch? IN a
Leko, would the SPH also be proposed to be brighter than a
HPL, out punch a GLC and HPR?
I'm also noting in comparing lamp specs that the
color temperature, lamp life and luminous output of the SPH lamp are the exact same as that of the HPR (before internal
reflector comes to
play) and most including Ushio FLK lamps on the market which while more old school are for the most part similar in bulk light output still larger than GLC
filament size. 8x18mm to 5.5x12.5mm dependant upon brand/year made for the FLK. Is the SPH more realistically comperable and similar if not larger given
filament size to the FLK with its larger flament but more output than a GLC - this only a FLK with a transverse instead of
axial filament? Kind of wondering in studying the lamp specs this compares to.
For the SPH 575/LL lamp, I note that while the long life GLA alternative has more luminous output as similar to the high output version, it has average lamp life almost half that of a GLA if not in some cases lower
color temperature and most important only 800 hours of lamp life instead of the norm of 1,500 to 2,000 lamp hours. Is this a typo or correct in it being a middle
ground between a long life 575w/115v lamp and a high output normally 300 hour lamp? Not that a middle
ground balance between output and lamp life is a bad thing persay.
Finally, while normally mostly I buy the lamps for a
ETC S-4
fixture based
house, I do at times specify and
stock for resale lamps for other applications. Would it be possible for me to
play test this lamp against the lamps and fixtures above for my personal knowledge and education beyond the questions above?