When was my server last rebooted?

foreach ($server in 'SERVER1','SERVER2')
   {
    #Test WMI Connection
    $testCon = 0
    $testWmi = Get-WmiObject Win32_OperatingSystem -computerName $server
    if (-not $testWmi) { $testCon += 1; write-host "Cannot connect to WMI on remote server, $server" }
    $myCol = @()
    #Get WMI info
    $wmi=Get-WmiObject -class Win32_OperatingSystem -computer $server -ErrorAction SilentlyContinue
        $Time=$wmi.ConvertToDateTime($wmi.Lastbootuptime)
    [TimeSpan]$uptime=New-TimeSpan $Time $(get-date)
    $uptimeDays = $uptime.days
    $uptimeHours = $uptime.hours
    $uptimeMins = $uptime.minutes
    $Object = "" | Select Server,Days,Hours,Minutes
    $Object  = New-Object -TypeName psobject
    $Object  | Add-Member -MemberType noteproperty -Name Server $server
    $Object | Add-Member -MemberType noteproperty -Name "Days" $uptimeDays
    $Object  | Add-Member -MemberType noteproperty -Name "Hours" $uptimeHours
    $Object | Add-Member -MemberType noteproperty -Name "Minutes" $uptimeMins
    $myCol += $Object
    Write-Output $myCol
    }
Write-Host "Completed Uptime Check"