LEDs are only on the sides. So if you want to replace a light bulb that needs light from above (in front), there are only LEDs on two sides. I replaced one of the accent bulbs in the headlight on a Lexus RX400H and couldn't see it as there is no reflector to direct the parking lights forward. However, with the yellow side marker, this is normal as you can see the LED lights attached to the side. They are pretty light and easy to install.
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