If you're on a tight budget, I've had decent experiences with many of the Feit Electric grow bulbs and lights as supplemental lighting for my tropicals in winter. They have a big but North facing window, so a couple cheap lights help them not get too leggy over winter.
Feit tends to list their PAR/PPF ratings as an average over an area, which makes their numbers look worse than others in the same market, but it actually indicates that they know how their product is used in the end, and that they know what they're doing even if they're just the little guys.