 In the 1990s, he expanded his practice to include installations based around the technology of large-scale digital prints.Halley is also known for his critical writings, which, beginning in the 1980s, linked the ideas of French Post-Structuralist theorists such as Michel Foucault and Jean Baudrillard to the digital revolution and the visual arts.From 1996 to 2005, Halley published "Index Magazine", which featured in-depth interviews with emergent and established figures in fashion, music, film, and other creative fields.