Well thenâ?¦during your extensive research you should have found there are different types of bulbs available. Universal, Horizontal and Vertical burning base bulbs each one puts out different lumens. Most hydro stores only carry the Universal because they got tired of people bring back used bulbs or complaining they burned up to quick. It gave them a bad rep so they quit carrying the better bulbs and settled on universal to save shelf space too. You can still find the best bulbs at wholesale electrical supply houses but you need to know what to ask for. They are not much help they think youâ??re lighting a warehouse floor and not plants.re = higher smell due to the transpiring to maintain a constant internal temperature.