Looking for recommendations / information on H4 LED Bulbs

[KYBlueOval]

Does anyone on the Forum have experience with H4 LED Bulbs. I want to buy a pair ,but know next to nothing about them. I like the low draw and low heat, and the crisp white light, and that is about the extent of my H4 LED knowledge.
What do I need to know before I purchase? Any bulbs  or brands I should stay away from?
Thanks
John