There are several online sites that sell both types of bulbs. Before we can advise you of what type of bulb you need, we need to know what livestock you plan on keeping AND, which type of bulb you've decided to go with.
o0oo0o sorry about that...i have turbo snails....nassarius snails....a clam....some softies...lps...zoos...softies....mushrooms...and like 5 hawaiian dusters