Glowing effect in a UILabel using inner shadow

I am trying to achieve this glowing effect for a UILabel as shown below :

I have subclassed UILabel , and created a custom label class that adds an outer shadow.

Edit : Here's the code i have used for outer shadow/glow in my custom Label class :

- (void)drawTextInRect:(CGRect)rect {
UIColor *insideColor;
UIColor *blurColor;
CGContextRef ctx = UIGraphicsGetCurrentContext();

insideColor =[UIColor colorWithRed:255/255.0 green:255/255.0 blue:191/255.0 alpha:1];
blurColor =[UIColor orangeColor];    


    CGContextSetFillColorWithColor(ctx, insideColor.CGColor);
    CGContextSetShadowWithColor(ctx, CGSizeMake(0, 0), self.glowAmount, blurColor.CGColor);
    CGContextSetTextDrawingMode(ctx, kCGTextFillStroke);

    [self.text drawInRect:self.bounds withFont:self.font lineBreakMode:self.lineBreakMode alignment:self.textAlignment];
}

But this gives me the following result

As you can see this lacks the desired effect because of the missing inner shadow. Can anyone suggest how to achieve this?

Thanks!