Sunshine Opto-electronics Enterprise Co.,ltd company FAQ

PMMA LED lenses offer superior optical clarity with over 92% light transmittance and excellent UV resistance, making them ideal for indoor and high-visibility applications. PC LED lenses provide exceptional impact strength and higher heat resistance (up to 130°C), but require UV coating for outdoor use. Choose PMMA for best light output and weatherability; choose PC for durability in high-temperature or high-impact environments. Please see this blog for details: PMMA vs PC Optical Lenses for LED Lighting.

The main advantage of polycarbonate (PC) lenses over ordinary glass lenses is their superior impact resistance. They are lighter, stronger, and less prone to breakage.

There are two relatively simple methods:

1. Listen to the sound: Gently tap with your knuckles or a hard object. PMMA produces a crisper, louder sound, similar to a metallic tone. PC produces a relatively lower, more muffled sound.

2. Try bending (for sheets or thin plates): Try bending the led plastic lens slightly with your hand. PMMA feels harder and more brittle, with less elasticity, and feels like it's about to break. On the other hand, PC exhibits excellent toughness, feels more flexible and elastic, and can be bent into larger arcs.

If the LED PC lens does not have a UV coating, the cost of the LED PMMA lens and the LED PC lens is roughly the same. Please consult our engineering team for specific pricing.

Yes, for most common outdoor scenarios such as roads, balconies, and building facades, IP65 is a perfectly acceptable and commonly used standard. However, for luminaires installed at low positions, potentially exposed to standing water, or those that are recessed (buried), we strongly recommend upgrading the standard to IP67 or IP68.

No. As we mentioned earlier, blindly choosing IP68 protection can not only lead to unnecessary cost increases but also affect the heat dissipation efficiency of the luminaires due to excessive sealing, thus shortening the LED lifespan. For most outdoor lighting applications, IP65 or IP67 is a sufficient and optimal choice. Only when the luminaire truly needs to be completely submerged for extended periods is choosing an IP68 product correct and necessary.

No. Only dimmable LED drivers support dimming. The driver must also be compatible with the dimming method used, such as 0–10V, Triac, or DALI.

Yes. A constant voltage LED power supply can power multiple LED strips as long as the total wattage does not exceed the power supply’s rated capacity and proper wiring is used.

A buzzing noise from an LED driver is often caused by electromagnetic interference (EMI) or vibration in the components. The most common causes are:

1. Dimming Compatibility: If the LED driver is dimmable, certain dimmer switches or incompatible dimming technologies (e.g., TRIAC) can cause buzzing.

2. Capacitor issues: Aging or low-quality capacitors may vibrate or emit noise.

3. High-frequency switching: Some drivers operate at high frequencies that can produce audible noise, especially in poorly shielded units.

4. Overloading: An overloaded driver may cause stress on components, leading to noise.

Yes, we provide this service.