No, you do not have to use Vector replacement bulbs. Any brand of light that fits the length and wattage specs will work.
The Vector Classic 20-7019 Replacement Bulbs are 18" long.
The Vector Classic 20-7019 Replacement Bulbs produce standard white light.
No, Vector Classic 20-7019 Replacement Bulbs are not shatter proof. We do however have the 15 Watt 18" Shatterproof Bulbs. Please let us know if you have any additional questions.