Ive got 50 watt LEDs. Much more lumens and penetrates water better than the 27s. I also put "CarpLite" led filter covers on them as it made the LED reduction in glare and worked SO SO much better than using LEDs unfilterd. Here is the link to the filters:
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xcarplite.TRS0&_nkw=carplite&_sacat=0
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xcarplite.TRS0&_nkw=carplite&_sacat=0