Sealed Beam Lamps would be the general classification for most low
voltage PAR lamps - used for tractors, loccomotives, aircraft, the landing lights for them, Autos or what ever providing low - other than
line voltage to the lamp. The "
ACL" term is more one our industry uses in general just as "
Leko" is a term used in general.
Lots of range in size
voltage, wattage and beam spread out there for lamps designed for all kinds of purposes besides use for the aircraft industry. Believe a
PAR 56 size was something that came out of like 57' Chevy type technology as a lamp size by the way as further info.... (not confirmed or for sure beyond what I think at one
point I heard.)
Still back to reality, even a really really close to MFL lamp at 115v/1Kw which has to be one of the most powerful
PAR lamps on the market that's still a
filament lamp type. The #4555 is 600,000
candlepower at 11x20 degrees in
beam angle - over five times that of a FFR in output and just as much output of the 28v/600w VNSP #4559 "
ACL" less commonly used on
stage but the most powerful
ACL lamp once used on
stage/rock for the highest punch. Granted the #4555 is only a 25 hour lamp and costs well over a hundred dollars per lamp which no doubt is why they don't get used more, but there really is a huge range of lamps out there - sealed beam lamps range in all sorts of ways - this including beam spread.
My un-latest updated file on
PAR lamps in general alone -
line or low volage on the same file based on size than wattage is 1,409KB of 8pt text on a table. That's a lot of
PAR type lamps to choose from and mostly in other than
line voltage. Lots of stuff out there including
PAR 46's WFL lamps.
By the way, the smallest
PAR lamp is a
PAR 14. Osram and Bulbrite both have a 35w
PAR 14 flood on the market.