I am a retired f-16 pilot and current corporate jet pilot. during departure from kmia airport, my copilot and i witnessed a column of white light approximately 50 miles north of miami international airport. the column of light was approximately 40ft- 80ft in diameter spanning from the surface up to infinity. we were on climb-out passing 10,000 and passed approximately 200yards from the light column. we both were completely baffled at what we were looking at. in my 35 years of flying i have never witnessed anything like this. unfortunately, when traveling at 300+ kts, we quickly passed this phenomenon and had no time to take a picture. the column of light was stationary and was not a ground based spot light.