Is there an upgrade kit? What specific brand and model of
Fresnel are you using???
Overall, there are upgrades for some
Altman Studio Fresnels on the market, I even have the only copy of a 5Kw 5000L
Fresnel upgrade before they decided my bitching about it not
fitting on the
fixture it was upgrading was not worth a production
line in them - instead they are just upgrading the lamp
base. That’s after about 3 versions of the 2Kw
Fresnel upgrade after similar bitching and
play testing. These were all to resolve heat/lamp
base issues and not to resolve any projection/lamp issues though there is a new GE/Thorn 2.4Kw CYX lamp on the market that would be an upgrade in my 2000L
fixture not that it’s needed. The 1Kw fixtures do not have such heat issues.
For the most part, a
Fresnel of 30 years ago is the same as one of today. 10 years or so ago
Altman did revise their
reflector into a double
reflector type which is probably more efficient, but you can’t really tell the difference. Such reflectors would retrofit on almost any age or brand of
fixture if you need to replace old ones. The lenses of today are the same as yesterday as long as for some reason if green they are not in your
fixture.
Fixture to
fixture as long as your
reflector is in good condition there will not be much a difference between fixtures. Never saw a green
Fresnel lens. Dirty lenses sure, green or bad lenses nope - believe they are all Kupp. That’s so far.
There is little details about lenses and fixtures however, for instance the #65Q is not rated for a 1Kw load. If you have the 1KAF series, than it is but it’s beam spread is slightly smaller either due to internal
fixture distancing of lamp to
lens -perhaps a heat issue, or a different
lens. Same with the 1000L series of Studio
Fresnel - it should also be smaller in
beam angle, but it on the other
hand does use a different type of lamp and lamp
base which is higher output I expect for shorter life. (Don’t make me look it up because it’s not the same and you can’t plop a G-22
base into a P-28s
Fresnel fixture - apples and oranges especially with cooling.) That’s just with
Altman fixtures. The G-22 Based EGT is 500 lumens brighter - not much better.
Is there an upgraded lamp? Nope, none planned either. Sorry, I feel your pain. I take it for granted your Parnels were using 750w/115v high output lamps? Given that’s the case, yep it should have a higher
color temperature to start with, than due to operating at a lower
voltage - over
voltage it will be boosted more still as opposed to the 120v lamp on the
Fresnel that’s operating under it’s rated
voltage thus
dimmer yet.
HPL = about 3,250°K, 21,900 Lumens, 300 hours at 115 volts to which it’s normally operating over all of that at about 118v. This gives less life still but more output and
color temperature. The 1Kw BTR
Fresnel lamp on the other
hand is 3,200°K, 28,000 Lumens and 250hours in life (both roughly dependant upon what brand of lamp is in the
fixture and it’s actual age.) The BTR however is operating at about 118v instead of it’s rated 120v thus all the above drops, but life goes up.
Ok, I checked the lamp specs. Given them, are you sure the 750w
Parnel was providing more actual light, or just seemed brighter? Also that the beam spreads were the same - the less the spread, the more the
intensity. Granted the
reflector/
lens assembly on the
Parnel is no doubt much more efficient, but it’s fairly obvious that the BTR lamp has lots more output even if not at it’s rated
voltage. Possible it was dim but it’s light at the lamp at least was still more. Depends after that on the
reflector efficiency and a
Fresnel reflector/optics are not very efficient. Can’t say, don’t have a
Parnel though I do have all the
Altman fixtures, but if their
reflector assemblies are anything like the S-4
Par, than the
reflector would be sending at least 50% more light towards the
lens. Big difference.
Still, you want to best that danged
Parnel? Here is your best chance at it: Instead of the BTR try a nice
incandescent DFD, DFT, DRB, DRC, or DRS in your
fixture. Hee hee hee, even a old
incandescent style lamp some at 115v, most at 120v can best a
HPL lamp hopefully. Granted they range in lamp life from 10 to 50 hours and each has differences in their advantages, but they are going to be lots brighter both in
color temperature and lumens. Tons brighter in fact. Given you can live with the lamp life. There is your upgrade lamp, ancient technology.