This kit and bulb are desinged for use with the jump start light system and stand. They can also be used by themselves. Maximizes your germination success and great for seedlings, cuttings, veggies, flowers, herbs, greens and more. Faster growth with high output T5 full daylight spectrum bulb. Cool running design-position light closer for healthier, hardier plants. Included T5 bulb over 2 times more efficient than ordinary grow lights. 20% more light intensity than comparable fluorescent grow lights. This item comes in 2ft(JST52) and 4ft (JST54) lengths.