What's the difference between life conditions and living conditions? I often use the former. "The life conditions of the Victorian workers", for example.
"Living conditions" refers to the circumstances of a person's life—shelter, food, clothing, safety, access to clean water, and such. I don't think "life conditions" is an idiomatic phrase. An alternative might be "conditions for life," which refers to circumstances needed for physical or biological life to exist—water, energy, a suitable environment, and such.
If there is a distinction then
living conditions = conditions under which you live
life conditions = conditions under which you are alive, though other phrases like 'conditions for life' are more common
"This relative paucity of species in the chalk formation may be due in part to unfavorable life conditions in the area where chalk was being deposited, or to unfavorable conditions of preservation, or to both".
- CH Dane, WG Pierce & JB Reeside: The Stratigraphy of the Uppper Crethaceous Rocks North of the Arkasas River in Eastern Colorado(1937)
Life conditions is used in the social sciences, taken from Björn Kraus, as quoted in the entry for Lifeworld on the WikiVisually website:
"Life conditions mean a person's material and immaterial circumstances of life.
Lifeworld means a person's subjective construction of reality, which he or she forms under the condition of his or her life circumstances."