Profile Glow Coding Help

Hey well in my my forums i have it setup so you can chose a glow and text color for a custom title. It works perfectly and all...but there is a slight problem

What happens is that if you leave the field blank it just defaults to using a red glow and white text (the text is fine...it's the glow that bugs me) I believe it is glowing red...because of how the custom vb code is setup maybe?

So how can i set it so if the glow field is blank no glow will show?

This is how it is setup as of right now to display in the postbit, incase you need this info

<font style="filter:glow(color=$post[field9], strength=2);height=2px" face="Verdana" size="1" color="$post[field8]"><b>$post[usertitle]</b></font>

also the attachment is what the 2 fields look like in usercp

thanks in advance for any help