Banggood Dear Jagdflieger86, Thank you for choosing Banggood and sorry for hearing that.Since we couldn't help you to figure it out via your description.Sorry,could send us your order number and a video or some pictures to show your problem via this link:http://www.banggood.com/Contact-Us_hi111? We will try our best to help you solve the problem you met and issue a proper solution for you as soon as possible.Hoping your kindly understanding,we wish you have a nice day.

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Happylada NOT really good at electrical but 5 A power supply at 110V is (V * A = watts) 550 W. Since the rule, using your calculations, is about v150W, there should be lots of reserves.That said, I do NOT know how to calculate the load for the 300 LED's

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Happylada I tested the output voltage on the transformer and it was only 9.75 volts under load of these lights.Using a 10A PS doubled the light output.

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banggood @SoftSolutionPOINTfr Dear customer,
Thank you for choosing Banggood.
We promise we will offer more good and affordable products for customers and improve our products' quality.
If you have any after-sales problem with the product,welcome to contact us via this link:http://www.banggood.com/Contact-Us_hi111 .
We wish you have a nice day. Best regards,
Banggood Team

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