Here is a white plug-in night light...
ECO friendly info
Monitor the internal temperature of your greenhouse by simply attaching to the glass - solar powered.
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A great new Gadget for any Gardening Enthusiast - simply attach to the inside of your greenhouse and you can monitor the internal temperature, waterproof so it won't matter if it gets sprinkled by the watering can.
Can also be used outside - attach to an outside window to see the external temperature.