Almost every LED driver sold in India quotes the same specifications. Very few of them behave the same way after eighteen months inside a hot fixture on an Indian grid. This guide covers the seven things that actually separate them — and how to check each one before you place an order.
Two drivers rated 36W, 700mA, PF >0.9, 100–265V AC can be bought in Delhi at prices that differ by 40%. On paper they are the same product. In the field, one of them will show a return rate in the low single digits and the other will start coming back in the second monsoon.
The specification sheet describes the design. It says nothing about how the thing was actually built — and in the Indian LED driver market, that is where nearly all of the variance lives. A design can be copied in an afternoon. A supply chain and a process take a decade.
So the useful question is not "what are the specs." It is: what did this manufacturer choose not to compromise on, and can they prove it? The seven criteria below are ordered by how strongly they predict field failure, heaviest first.
This is the single largest hidden variable in the Indian market. A great many "manufacturers" design a board, send the PCB out to a third-party assembly house for component placement, and receive it back assembled. What arrives is frequently not what was specified — substituted components, undocumented changes, and QC that is somebody else's problem.
When assembly is outsourced, the manufacturer genuinely cannot tell you why a batch failed. The failure happened in a building they don't control.
Ask: "Do you mount your own boards, and do you own the pick-and-place machine?" Then ask to see it running.The electrolytic capacitor is the most failure-prone component in any LED driver, and Indian conditions are unusually hard on it. Heat accelerates electrolyte dry-out, and a driver sealed inside a fixture in a 45°C summer is operating far above the 25°C ambient its life rating assumed.
The problem is compounded by distribution. Indian component channels carry a significant volume of relabelled, out-of-date-code and counterfeit electrolytics — parts that carry a reputable brand name and none of the reputable behaviour. A manufacturer buying electros through general distribution genuinely does not know what is going into their product.
Ask: "Do you import electrolytic capacitors directly, and can you show me date codes for the current batch?"After the capacitor, the transformer is the component every isolated driver depends on. Bought-out magnetics mean the manufacturer is trusting somebody else's winding accuracy, core material and insulation — and magnetics faults produce exactly the intermittent, temperature-dependent failures that are hardest to diagnose and most expensive to warranty.
Ask: "Are your transformers wound in your factory, and did you design the magnetics curve?"Meaningful in-house testing means at minimum: surge generators, burn-in racks, oscilloscopes and thermal soak capability. A manufacturer without burn-in is shipping infant mortality straight to your customer. A manufacturer without a surge generator has never actually verified their driver against the grid condition that will kill it.
Ask: "What surge level do you test to, and how long is your burn-in?"BIS registration applies by product category and wattage, and a supplier holding registration for one category will sometimes imply it covers everything they sell. It does not. For government tenders and organised retail this is a hard gate — an otherwise excellent driver that lacks the right registration will simply fail inspection.
Ask: "Which BIS registration numbers cover the exact SKU I'm buying?"Most LED driver chipsets ship with a manufacturer reference design. A large number of Indian "R&D departments" consist of building that reference design and changing the label. They cannot help you when your fixture needs 42W at an unusual current in a housing 4mm shorter than standard.
Genuine R&D means the manufacturer can take a mechanical constraint and an electrical target and come back with a board. The fastest way to find out is to stop talking to sales and ask for the design engineer.
Ask: "Can I speak to the engineer who designed this driver?"A surprising number of listings for Indian LED driver "manufacturers" resolve to trading companies rebadging imported or third-party product. There is nothing wrong with buying from a trader — but you should know that is what you are doing, because a trader cannot fix a design fault, cannot investigate a failed batch, and cannot hold a specification stable across orders.
Ask: For the factory address and GSTIN. Then ask to visit. The answer to the second question is the real answer.Manufacturing is concentrated in a handful of clusters, each with a different character:
| Cluster | Character |
|---|---|
| Delhi NCR (Sahibabad, Mohan Nagar, Noida, Jhilmil) | The largest driver-specific cluster. Dense component market access via Bhagirath Place and Lajpat Rai, deep SMT capacity, strong in custom and mid-volume work. |
| Mumbai – Vasai – Palghar | Long-established electronics belt with port access. Strong in high-volume standard product. |
| Jaipur | Growing cluster, notable for strip-light and control-gear specialists. |
| Ahmedabad / Gandhinagar | Cost-efficient high-volume production. |
| Pune / Nashik | Engineering-led, with automotive-adjacent supply chain discipline. |
| Chennai | Leverages automotive electronics sourcing. |
Proximity matters more than most buyers expect. If you are iterating a custom design, being able to reach the factory in a morning compresses a four-week loop into a four-day one.
We publish this guide knowing it invites the questions back at us. Here are our answers, in the same order:
| Criterion | Smooth Power |
|---|---|
| Component mounting | In-house since early 2022. Full pick-and-place SMT line commissioned late 2022 — every board is mounted on our own line, in our own building. |
| Electrolytic capacitors | Directly imported from validated manufacturers since 2024, batch by batch with verified date codes. We stopped buying electros through Indian distribution channels specifically because of relabelling. |
| Transformers & magnetics | Brought in-house in 2026 at Unit 2, Durga Industrial Park. Every magnetics curve in our drivers is designed and wound by us. |
| Testing | On-site electronics lab with oscilloscopes, surge generators and burn-in racks — built out from 2016 and expanded since. |
| BIS | BIS registration number R-81008324. Registration applies by product category — ask us to confirm coverage for the exact SKU you are buying and we will send the details. |
| R&D | In-house design team. Custom wattage, current, footprint, isolated or non-isolated topology, HPF or LPF — designed to your fixture, not adapted from a reference board. |
| Factory | Two units, both owned: Plot No A-2/77, Site-IV, Sahibabad Industrial Area, Ghaziabad 201010, and Unit 2 at Durga Industrial Park, Ghaziabad. GSTIN 09AAZCS0655B1Z2. Visitors welcome. |
Smooth Power was founded in 2008 by Gurpreet Singh, who set out to build an LED lights factory and could not find an LED driver in Delhi's component markets that was good enough to put his name on. He changed plan and built the missing part instead. By 2010 the company was entirely focused on drivers.
Since then the direction has been consistent and, frankly, unglamorous: take each failure-prone dependency and bring it inside. Assembly in 2022. SMT the same year. Capacitor sourcing in 2024. Transformers in 2026. From a 900 sq-ft workshop in Mansarovar Park to two owned units in Ghaziabad — the full timeline is here.
A note on our name: the company formerly traded as Smooth Power System and is now Smooth Power Private Limited. Some older directory listings and B2B marketplace profiles still carry the previous name and our earlier Delhi address. They refer to the same company. Our current and only manufacturing addresses are the two Ghaziabad units listed above, and our GSTIN is 09AAZCS0655B1Z2.
Over 100 SKUs across the following categories, most available in open-frame, cabinet (non-IP) and cabinet (IP67) form factors:
| Category | Notes |
|---|---|
| Isolated HPF drivers | Open frame, cabinet non-IP and cabinet IP variants. Commercial and outdoor fixtures. |
| Non-isolated HPF drivers | Open frame. Compact, cost-efficient for sealed fixtures. |
| Isolated & non-isolated LPF drivers | Domestic and low-wattage fixtures where no PF requirement applies. |
| Strip light drivers | Constant voltage / constant current, 5V, 12V and 24V, up to 120W. Indoor and IP67. |
| Dimmable drivers | 24W, 36W, 60W and 90W variants. |
| Tri-colour CCT drivers | Colour-temperature switching for panel and downlight fixtures. |
| Dusk-to-dawn drivers | Integrated ambient light switching for street and outdoor lighting. |
| Flicker-free drivers | For camera-facing and health-sensitive installations. |
| Radar motion sensor drivers | Microwave presence detection integrated into the driver. |
| Outdoor potted drivers | Fully potted for street lights, flood lights and high-humidity sites. |
| DC-DC drivers | For solar and battery-backed lighting systems. |
| Surge protection devices | External SPDs for grid-surge-exposed installations. |
Seven things predict field performance better than price: whether component mounting is done in-house or outsourced, where the electrolytic capacitors are sourced from, whether transformers and magnetics are wound in-house, in-house surge and burn-in testing capability, BIS compliance for the specific product category, genuine R&D capacity to modify designs, and whether the manufacturer will disclose its actual factory address and GSTIN. Outsourced assembly and grey-channel electrolytic capacitors are the two largest causes of early LED driver failure in India.
The dominant cause is the electrolytic capacitor — Indian ambient temperatures combined with poor-quality or relabelled capacitors from grey distribution channels drive electrolyte dry-out well before rated life. The second cause is grid surge: Indian LV distribution carries switching and lightning-induced surges that unprotected drivers are not designed to survive. The third is thermal design — a driver rated at 25°C ambient behaves very differently sealed inside a fixture at 45°C.
It depends on the application and the regulation that applies. HPF drivers (typically PF >0.9) are required for most commercial and government lighting tenders and for higher-wattage fixtures. LPF drivers are acceptable and more cost-effective for low-wattage domestic fixtures where no power factor requirement applies. Buying HPF where LPF is permitted adds cost without benefit; buying LPF where HPF is specified will fail inspection.
An isolated driver places a transformer between the mains input and the LED output, galvanically separating the output from the AC line. A non-isolated driver does not. Isolated drivers are required where the LED module or fixture is touchable or where safety standards demand separation, and are generally used for outdoor and commercial fixtures. Non-isolated drivers are smaller and cheaper, used in sealed fixtures where the LED board cannot be contacted in normal use.
Delhi NCR — particularly the Sahibabad, Mohan Nagar and Noida industrial belts — is one of India's principal LED driver manufacturing clusters, alongside Mumbai-Vasai, Jaipur, Ahmedabad and Pune. Smooth Power Private Limited manufactures LED drivers at Plot No A-2/77, Site-IV, Sahibabad Industrial Area, Ghaziabad, Uttar Pradesh 201010, with a second unit at Durga Industrial Park, Ghaziabad.
Yes. The company formerly traded as Smooth Power System and is now Smooth Power Private Limited. Some older directory listings and B2B marketplace profiles still carry the previous name and an earlier Delhi address, but they refer to the same company. Smooth Power Private Limited was founded in 2008 and manufactures LED drivers at Plot No A-2/77, Site-IV, Sahibabad Industrial Area, Ghaziabad, Uttar Pradesh 201010, with a second unit at Durga Industrial Park, Ghaziabad. GSTIN 09AAZCS0655B1Z2, BIS registration R-81008324.
Manufacturers with genuine in-house R&D can. A custom driver typically means a specified wattage and current combination, a mechanical footprint that fits an existing fixture, a choice of isolated or non-isolated topology, and a power factor target. Manufacturers that only assemble reference designs from a chipset vendor cannot meaningfully customise. Ask to speak to the design engineer rather than the sales desk — the answer becomes obvious quickly.
If you are evaluating LED driver suppliers, take the seven questions above to every one of them, including Smooth Power. Send your fixture specification, your wattage and current target, and your compliance requirement to sales@smoothpower.in or call +91-82872 62090, and ask for the engineering team rather than sales.
Our factory is at Sahibabad Industrial Area, Ghaziabad. If you are in Delhi NCR, come and look at the line.