Wow. Most reviewers give these transformer-powered LED Malibu lights high ratings. They must be blind. These units -- the standard flood, the high-power flood, and the tier or 'pagoda'-style lights -- all give off a terrible high-frequency flickering light. This problem has plagued other LED light sources such as cheap LED Christmas light strings, and now Mailbu's deficient design has introduced the same problem to landscape lights.
This design flaw may not be immediately apparent. The effect is similar to that of a very-fast pulsating strobe light; if you're looking at one of these lights while moving, or while something moves between you and the light, it's jarring, disconcerting, even sickening. To see the effect dramatically, spread the fingers of one hand and then wave it rapidly in front of one of these lights. You'll see multiple frozen images of your hand, one for each of the rapid pulses.
For another few cents Malibu could have added the simple circuitry needed to correct this problem, but they didn't bother, and as a result their lights are not ready for prime time. Mine are all getting returned, and I'll be buying my LED landscape lights from somebody other than Malibu.
(NOTE: These comments apply ONLY to the transformer-powered, wired Malibu LED lights, NOT the solar-powered units. The problem stems from the alternating current the transformers supply. This is not the case with the solar units -- those feeble toys have their own problems.)