I have built a few hundred audience blinders over the years. First define if you want a
wash blinder or more of a ray (VNSP) light. Typically an
audience blinder will use a 120v/650w very high output DWE
wash lamp wired in parallel for a maximum of three per
circuit. Otherwise wired in series for 250w/28v #4596 VNSP lamps. There is other lamp choices. Over the years, many companies have made audience blinders with 12v MR-16 lamps,
PAR 16,
PAR 30
etc.
HI-Spot 95 Osram
PAR 30, Quartz NSP 10̊ 75w/230v E-26 Jarag
PAR 30
HaloPAR 30 Osram #64845
PAR 30, Quartz FL 30̊ 75w/230v E-27 KR-25
Two examples of even individually dimmable lamp audience blinders, the Jarag and KR-25. There is also now
LED audience blinders. Than the 5-lite Mole Richardson #5511 Five-Light
Molefay I converted to PAR36/9WW40/
LED Halco/ILT #80651
PAR 36,
LED 40̊, (807154806515) for my work table light. Easy enough if
Leko Dpt. is focusing their lights in my direction, to turn it on and focus it in their direction. It's bright even if about 15 years old in 1st generation 9w/12v
LED ttechnology designed for outdoor lighting. Probably some notes somewhere on the website about the
fixture.
Overall, once you specify a specific lamp desired, the work starts in figuring out if this lamp - or bunch of them in a mockup will work for your purposes. Any lamp will make for lighting
fixture, but before you start, perhaps some lamp sockets screwed to a board in simulating your
fixture. Do a prototype in your theater space and ensure this is the lamp you want to work. I spend a few $K a year in R&D and learning stuff. For probably less than $100.00, prototype what you are thinking so as to ensure the lamp chosen will do what you want it to.
Were I to go 50w presumably store bought lamp, I would start by defining the beam spead desired, than 50w. leaves a lot to define in lamp size. The 75w/12v EYC lamp is a standard lamp for strips and probably for a MR-16
audience blinder. So if going
LED... one would want a comparable to it dimmable and with a high
CRI. Lots of lamps out on the market - thousands of them. Define by what specific lamp you want to use, output and beam spread. Than once a lamp is defined, you have a start once you identify it's lamp
socket, how you change lamps and if needed
transformer, wired in parallel or series if some form of resister (
shunt) is needed. Often for a standard custom
audience blinder, I will just buy parts from TMB to retain lamps for my
fixture design to work with in hole and keyway. Just because you are making your own
fixture, does not mean you need to make all parts from scratch.
Assuming you have chosen your wattage, how many lamps per
blinder, what is it's size in specific lamp and its
voltage? Overall 50w or
LED equivalent is dependent on a venu and
throw distance as with intent for how much blinding you want to do.
Photometrics data on proper audience blinders should be available on the Thomas, TMB, Technilux and Kupo websites amongst other makers of them. But hard to help design further given just a wattage given without both
voltage and lamp/
base type defined - this in addition to lamp to lamp type and how many lamps per
fixture.