Spent ages researching plug and play spike lights and glad I did. Opted for the Lumena Alvaled range and they proved a great choice. Lights are solid and well made with interchangeable LED bulbs which give you different lighting intensity in different parts of the garden. You will need at least 5 watts and probably more to light a small tree. Lights were very east to fit together with the whole system up and running in less than 15 minutes. Best advice is to buy a higher power transformer so you can add more lights at a later date. Git great advice from Bonnie who even went to the trouble of reviewing my proposed layout to ensure I had all the right parts which were delivered the next day. Excellent service and value.