Complex sentence: Wood's glass has been commonly used to form the envelope for fluorescent and incandescent ultraviolet bulbs ("black lights"), although due to its disadvantages in recent years other filter materials have largely replaced it (see below).
Split into simpler sentences: Wood's glass has been commonly used to form the envelope for fluorescent and incandescent ultraviolet bulbs ("black lights"). In recent years, due to its disadvantages, other filter materials have largely replaced it (see below).