Originally Posted By: Johnny2Bad
You could also replace the bulb with a red coated one or a red LED type. There are also red transparent covers that fit bulbs to change the illumination colour, assuming they can handle the heat of a 21 watt (typical brake filament) bulb. Then you can run the bike and wait while you seek an inexpensive replacement light cover that fits your budget, possibly from a wrecker.
Your Silicone sealant / repair tape solution will probably work as well, (the repair tape is cheap and works well) just making sure you are aware of all the options. Broken & repaired lamps are a significant issue with resale (some might see it as indicative of your maintenance or other repair habits) which would probably cost you more than the repair when it comes to what you could get for the bike if you sell it.
Truck has broken lense, not bike