We have 4 microbrites (the 1.5" standard wall fitting type)- 3 in the pool - 1 in the hot tub. After 3 years of not much problem- 1 of the lights in the pool gave up- flashing red- from the forums- thats an indication it needs to be replaced. At a replacement cost of $529 -that seems ridiculous- for a prodcuts that has had at maximum 100 hours of use- has anyone else here used alternative brands/suppliers? any DIY alternatives?