Grow Light Adapter - fits all AeroGarden 100340 bulb (1) Take your AeroGarden bulbs and make them usable in so many places. Their full spectrum light will be really helpful in the greenhouse on those low light days or in the winter. Use it as a backup in the event that your plants get too big for the little AeroGarden you have. Reuse the grow light bulbs anywhere a little extra light is needed after their 6 month lifespan in the AeroGardens. This adapter screws into any regular lamp/light fixture just like a normal light bulb. Once screwed in the adapter is 2" wide and sits 2" above the socket. You do not need a clamp lamp reflector to use this. Use it in a table lamp and put house plants around the lamp. It would work in any lamp with the lamp shade that allows 7.5" height clearance for the AeroGarden bulb (5.5") and adapter (2"). Buy multi pack for great cost savings.