Wish I could help you out mate but only know trade places in UK , get on e bay for parts you'll find some cheeper , im thinking about making my own led's custom built for my tank , works out loads cheeper if I can get all the bits and get it up and running
there's quite a few options and roads to go down ive been thinking about it for couple of months now , im now thinking of trying led strip light bulb in my t8 fixings already on tank but not sure the wattage is the same or if it'll work without trying it and there not cheep , any help on this would be great guys ?
thought about that myself , and also thinkin about getting some led chip strips and building my own multi coloured strip x2 for my big tank , just need to silicone them into plastic box housing with dimmer switches attached , you can buy strips that can be cut to size every few inches seem em on e bay