What is the difference between domestic and imported 7D poly-lifting?

[StAdrian]

Here are the differences between domestic and imported 7D poly-lifting: Different technologies: 7D painless poly-lifting: Uses the global MMFU (micro-focused and macro-focused ultrasound) technology, which is an upgraded version of the HIFU (high-intensity focused ultrasound) technology used in ultrasonic scalpels. Different focus areas: 7D painless poly-lifting: The focus points vary for different areas. The face uses micro-focused ultrasound with a small focus area and is equipped with high-efficiency transducers to ensure stable and efficient energy output. It provides precise positioning and painless treatment, significantly improving comfort. The body uses macro-focused ultrasound with a larger focus area, which is more effective in dissolving and breaking down fat. The energy points of the body probe are eight times larger than those for the face, targeting fat layers for lipolysis, with results far superior to ultrasonic scalpels and UltraShape. Different dotting methods: 7D painless poly-lifting: Dots are applied from front to back, allowing better control over the treatment area.

[VonElliott]

As an enthusiast who loves modifying car lights, I have personally used both domestic and imported 7D spotlights. The domestic version is really cheap, costing only a few hundred yuan. At first, the brightness was acceptable, but within less than half a year, it started to yellow and showed obvious light decay, making nighttime driving feel insufficiently bright and leaving me uneasy. The imported ones are significantly more expensive, usually costing over a thousand yuan, but after two years of use, they remain as bright as new. The materials feel sturdier, and they are less prone to water ingress on rainy days. I noticed that the imported technology uses a multi-layer coated reflector surface, resulting in a more concentrated beam without scattering. However, local repairs can be a bit troublesome. For those who frequently drive long distances, I recommend choosing the imported version. For daily commuting, the domestic version is sufficient, but it’s wise to keep a few spare bulbs on hand for emergencies. Regular maintenance, such as cleaning the lamp cover periodically, can help extend its lifespan.

[VivienneRose]

In terms of optical performance, domestically produced 7D spotlights often use ordinary plastic and reflective sheets, with a wider beam angle that may not achieve perfect focus, and the materials are prone to aging. Imported ones typically employ high-strength glass and precision design, enabling a narrower beam angle for focused light spots and stable, uniform light output. There is a significant price gap between the two, with domestic products starting at two to three hundred yuan, while imported ones can cost over a thousand. In terms of production processes, imported lights may undergo stricter certifications, such as the ECE standard, ensuring strong nighttime penetration without light scattering. When selecting lights, it's best to compare brightness tests rather than just looking at the price. After modification, pay attention to whether the wiring harness connectors match to avoid short-circuit issues. Regular maintenance is necessary to prevent dust accumulation from affecting the spotlight effect.

[JoelLynn]

When it comes to cost-effective options, domestic 7D spotlights indeed have obvious advantages, with a unit price only about one-third of imported ones, making them suitable for friends on a tight budget. However, in actual use, it's found that domestic parts have a shorter lifespan, possibly needing replacement in just one or two years, whereas imported ones can last several years without issues, making them more worthwhile overall. Cost consideration isn't just about the initial purchase price; it also involves maintenance frequency and matching accessories. Domestic parts are easier to find replacements for, with lower prices and convenience, but their spotlight effect may degrade over time, failing to illuminate distant areas. Imported materials are of better quality, with strong corrosion resistance, offering more peace of mind for outdoor use. Economical car owners are recommended to choose domestic options, doing what they can without overstretching; investing a bit more in good lights can significantly enhance nighttime driving safety.