#2 Which tp-link smart bulbs work best with this dimmer switch? i need candelabra bulbs.
Generally, you would not use smart bulbs with a smart light switch, as they serve similar purposes. For example:
Smart light switches should be used to control non-smart bulbs, in order to provide convenient, smart automation features to otherwise "featureless" bulbs or fixtures.
Smart bulbs should be used to introduce smart automation features to existing fixtures, lamps, etc. Typically, smart bulbs are preferred in lamps or fixtures when the customer prefers to have independent or individual control over each bulb's smart features and automation. A smart light switch is typically preferred when the customer would prefer to control an existing circuit of bulbs to control, dim, and/or automate them simultaneously as a group.
Since smart bulbs and smart light switches include their own independent smart features, using both in sequence would introduce redundancy and reduce overall efficacy of their intended designs.