try: 
Sub AA450_CONDITIONAL1()
Dim rg As Range
Dim cond1 As FormatCondition
Dim Lastrow7 As Long

'GET LAST ROW IN COLUMN J IN THE RECAP SHEET FOR THIS MACRO
Lastrow7 = Worksheets("RECAP").Columns("O").Find("*", SEARCHDIRECTION:=xlPrevious, SEARCHORDER:=xlByRows, LookIn:=xlValues).Row
'SET THE RANGE
Set rg = Worksheets("RECAP").Range("J5:J" & Lastrow7)
'clear any existing conditional formatting
rg.EntireColumn.FormatConditions.Delete
'define the rule for each conditional format
Set cond1 = rg.FormatConditions.Add(xlCellValue, xlEqual, "=$H5")
'define the format applied for each conditional format
With cond1
  .Interior.Color = vbGreen
  .Font.Color = vbWhite
End With
End Sub