Types of LED Strips and Drivers: How to Choose When Sourcing From China
SMD and COB strips, LED density, IP rating, 12V/24V voltage, Meanwell-class drivers — a breakdown for sourcing lighting from China.
An LED strip looks like a simple bulk item, but the same-looking glowing line in a photo can hide very different quality levels: LED density determines real brightness, the IP rating determines whether the strip survives a wet zone, and the driver determines whether the lighting stays even a year in or starts flickering and failing in sections after three months. When sourcing lighting from China for a home, restaurant or hotel, the strip and driver are the most common place for hidden cost-cutting at the factory, because a glowing strip in a photo doesn’t visually reveal its quality. Here’s what to check and what to lock into the specification.
Chip type: SMD and COB
SMD (Surface Mounted Diode) strips are the classic type, with individual point-source diodes spaced at regular intervals. The most common sizes are SMD 2835 (compact, high lumen output per watt, for white light) and SMD 5050 (larger, packs three diode chips into one housing — the base for RGB and RGBW). SMD strips show visible dots of light up close, so “dotting” is noticeable in open profiles without a diffuser.
COB (Chip on Board) strips have diodes applied as a continuous line with no gaps, giving an even line of light with no dotting or graininess even without a frosted diffuser. COB is brighter per centimeter of run but less flexible on color (usually white only) and slightly more expensive. It’s the choice for premium profiles, cove lighting on ceilings, and anywhere the strip is directly visible.
LED density and brightness
Density is stated as LEDs per meter: 60, 120, 240 LED/m for SMD (COB is rated as an “equivalent” of 320–528 LED/m). Higher density means brighter, more even light with fewer visible hot spots, but also higher power draw and cost. 60 LED/m is enough for accent lighting on a shelf or step; 120 LED/m and up is needed for task lighting on a kitchen backsplash or general light in a ceiling cove. Actual output should be locked into the spec in lumens per meter (lm/m), not just LED count — the same chip can produce different light output at different factories.
IP rating
| IP Rating | Protection | Where to use |
|---|---|---|
| IP20 | No protection from moisture or dust | Dry rooms: living rooms, cabinets, ceiling coves |
| IP65 | Silicone coating, splash resistant | Bathroom, kitchen backsplash, canopies, semi-exposed outdoor |
| IP67 | Fully sealed, brief submersion | Outdoor architectural lighting, wet zones near pools |
| IP68 | Continuous submersion | Pool-floor lighting, fountains |
An exposed IP20 strip in a bathroom or on a facade is a typical mistake when ordering from photos without a spec sheet: it looks identical to IP65 until the first season, after which it starts failing in sections as the contacts oxidize.
Voltage: 12V and 24V
Low-voltage 12V and 24V strips are safe to install without a licensed electrician, but need a step-down driver from the 220V/110V mains. On 12V, runs longer than 5 m show noticeable brightness drop toward the far end from voltage loss along the traces; a 24V strip handles twice the run length without visible loss and is the better choice for long runs (ceiling perimeter, staircases). For short, isolated runs the difference doesn’t matter.
Drivers (power supplies): CV and CC
The driver is not an optional accessory — it’s a spec item that determines the strip’s lifespan:
- Constant Voltage (CV) — regulated 12V or 24V output, the standard for most decorative LED strips wired in parallel.
- Constant Current (CC) — regulated current output, used for high-power LED modules and some track/architectural lighting where stable brightness without voltage sag matters.
Using the wrong driver type kills the strip almost immediately. Key contract parameters: power headroom of at least 20–30% above the calculated load (a driver running at the edge of its rating overheats and degrades faster), housing IP rating (IP20 for dry installs inside a cove, IP65/67 for wet and outdoor zones), and a named brand or component class — reference brands include Meanwell, Inventronics and Osram. A cheap unbranded driver is the main cause of humming, dimmer flicker and strip failure within the first few months.
RGB, RGBW and RGBIC
- RGB — three channels (red, green, blue), the whole strip lights up one color at a time.
- RGBW — RGB plus a dedicated white channel, giving clean white light without the pinkish tint of mixed RGB white.
- RGBIC (addressable) — a built-in chip on every segment lets different sections of the same strip show different colors at once and run chasing effects and gradients. It costs more and needs a compatible controller — the control protocol has to be confirmed separately, since RGBIC strips and controllers from different makers aren’t always compatible.
What to lock into the spec when ordering from a factory
- Chip type and density — SMD 2835/5050 or COB, LED/m count and the stated light output in lm/m.
- IP rating — matched to the actual install zone (dry, wet, outdoor), not a vague “moisture resistant.”
- Voltage — 12V or 24V, with the run length calculated to avoid brightness loss.
- Driver — type (CV/CC), named brand or component class, 20–30% power headroom, housing IP rating.
- Color temperature and CRI — exact values in Kelvin and a color rendering index number, not “warm white” in words.
- Control protocol — for RGB/RGBIC, confirmed compatibility between strip, controller and app.
The main LED component and driver factories are concentrated in Shenzhen and Zhongshan, the same hubs that supply the rest of decorative lighting — see the general breakdown of categories and risks in our guide to sourcing lighting and decor from China. If a strip ships bundled with furniture or finishing materials (shelf, cove or baseboard lighting), driver compatibility with the rest of the project’s electrical system should be checked at the spec stage — more on material quality control in our guide to sourcing building materials from China.
Planning LED lighting for a home, restaurant or hotel and not sure how to verify the real strip and driver specs at the factory? Send us your lighting plan or brief — we’ll help lock the chip type, IP rating and driver into the specification, check a sample before the production run and quote delivery to your site. Dream View’s fixed commission is 10% of the order value. Learn more on our China sourcing agent services page.
Frequently asked questions
What is the difference between SMD 5050 and SMD 2835 strips?
SMD 2835 is a compact chip with high lumen output per watt, the standard choice for white light and perimeter accent lighting. SMD 5050 is larger and packs three diode chips into one housing, so it is used for RGB and RGBW lighting where color needs to come from a single point. For plain bright white lighting, 2835 is more efficient at the same brightness.
What IP rating do I need for a strip in a bathroom or outdoors?
Dry rooms only need IP20. Wet zones (bathroom, kitchen backsplash, poolside) need at least IP65 — a silicone-sealed strip. Full submersion or direct water contact (fountains, pool-floor lighting) requires IP68. An exposed IP20 strip in a wet zone oxidizes quickly and starts failing in sections.
Why does brightness drop toward the end of a long strip run?
This is typical for 12V strips longer than 5 m — voltage drop along the copper traces reduces brightness at the far end. The fix is a 24V strip (handles twice the run length without loss) or feeding power from both ends with heavier-gauge connector wire.
Why is a cheap LED driver a problem, and how do I spot it in a spec?
A cheap, unbranded power supply is the main cause of flicker, humming and premature strip failure within the first few months. The specification should name a specific brand (Meanwell, Inventronics, Osram) or driver class, note voltage/current regulation, and require a power headroom of at least 20–30% above the calculated load.
What is the difference between a constant-voltage and a constant-current driver?
Constant Voltage (CV, typically 12V or 24V) holds a fixed voltage and powers standard LED strips wired in parallel. Constant Current (CC) holds a fixed current and is used for high-power LED modules and some architectural fixtures where stable brightness without voltage-based dimming matters. The two are not interchangeable — a CV strip will burn out on a CC driver and vice versa.
What is RGBIC and how does it differ from a regular RGB strip?
A regular RGB strip lights up in a single color along its entire length at once — every diode gets the same signal. RGBIC (addressable) strips have a built-in chip on each diode segment, so different sections of the same strip can show different colors simultaneously and run chasing effects. RGBIC costs more and needs a compatible controller — confirm the control protocol in the spec.