I was wondering if anyone had used the commercial type LED M6's from places like Sival, or LiteSource? You have to use the special plugs and adaptor fittings with this type of lite sets. You can't beat the HBL price on the LED M6's but the short term failure rate I've had after 1-2 years is close to 20%. I'm concerned that in just a few more years everything is going to fail. Mike has done a great job of getting me new lights under warranty but I'm concerned that when the warranty is over upkeep is going to be expensive. Plus with fading issues new light sets do not match the ones I'm trying to replace.