I'm assembling and acquiring equipment for my first darkroom and am basically down to the safelight. I'll be using Ilford's MGIV paper, which recommends a 902 light brown safelight. Is that the same as an amber? I looked on Freestyle and that auction site but have not seen a "light brown" light or filter offered.
You can use 'OC', amber or red safelights with that paper. Red safelights are 'safer' but quite a bit darker. Whatever you use, always conduct a proper safelight test before using them. Flat prints and muddy highlights are often a sign of unsafe safelights or light leaks.