I personally find the LED Lighthouse web site very unintuitive. I wanted to make an order of 3 lengths of box section aluminum however because I intend to connect these in series the six end caps I needed were 5 with holes and 1 solid. To order this combination from the web site meant having to add some of it to my shopping basket and then going back to the page I was on and add the rest. Fine you might say but I had to specifically say I didn't want the other items on the page. As a user all I want to do is tell you what I do want and not what I don't want. What added to this annoyance was the need to go back repeatedly to obtain all of the items I needed. As someone who has designed e-commerce web sites it seems overly difficult to me. However I was very please with all other aspects of buying from LED Lighthouse including the product quality and delivery times.