Hi Otis,
LightSwtich was excellent product however Radzen is very powerful as well!
Here is how to define column Angular template with conditions:
<span *ngIf="data.UnitPrice >= 20" style="color: red;">
${data.UnitPrice | currency}
</span>
<span *ngIf="data.UnitPrice < 20">
${data.UnitPrice | currency}
</span>
Best Regards,
Vladimir