I recently replaced both halogen bulbs with H4 LED bulbs. These new bulbs exceeded my expectations with performance. I have the kit that powers both headlights at one time. I was concerned that powering up 2 halogen headlights may be overtaxing my charging system on short trips. Also, I chose these bulbs because they have built in fans to help lower temps (high operating temps often kill led bulbs). In addition, I was able to get 50% off, they currently offer 30% discount.
Aiming the new bulbs is critical. Each headlight (2014 Zuma 125) has two phillips head adjustments directly below the lamp. An internet search will reveal a few easy measurements to help you get your headlights aimed correctly.
For less that 25 bucks, you can greatly improve your night time illumination and daytime visibility to others. Note: you will need to modify the rubber seals that fit over the back of the halogen bulbs to fit over the larger base of the new LED bulb. All the best.
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