Actually I have seen stop signs in Mexico...they say "ALTO" on them!
They started ALTO on fluorecent tubes around 1995-1996....the first HPS had ALTO in 1998....I have 1997 Philips HPS are they are NOT ALTO while I have a 1997 F40T12 that is labeled ALTO! In fact I have NOS 1998 HPS that actually does not have ALTO sleeve!
They started ALTO on fluorecent tubes around 1995-1996....the first HPS had ALTO in 1998....I have 1997 Philips HPS are they are NOT ALTO while I have a 1997 F40T12 that is labeled ALTO! In fact I have NOS 1998 HPS that actually does not have ALTO sleeve!