DRL Indicator LED Bulb SwitchBack Turn Signal — 66-SMD dual-colour switchback bulb: white DRL, amber turn signal, in one bulb. Converts any non-DRL car to DRL-equipped. Error-free.
| 🏷️ Brand | TecUpdater |
| 📦 Quantity / UOM | Set of 2 (1 Pair) |
| ♻️ Return / Exchange | Eligible as per policy |
| 💡 LED Type | 4014 SMD × 66 (High-Intensity Chips) |
| 🔋 Voltage Range | 12V DC |
| ⚡ Power Consumption | 4.2W (White DRL), 25.2W (Amber Turn Signal) |
| 🎨 Color Output | 6000K White (DRL), Amber Yellow (Turn Signal) |
| 📏 Lighting Angle | 360° wide beam coverage |
| 🔌 Socket/Connector | PY21W / BAU15S / 1156, T20 / 7440 / W21W |
| ⏳ Lifespan | 30,000+ hours |
| ⚙️ Features | Dual-color switchback (DRL + Turn Signal), automatic switchback function, built-in CANBUS error-free, vibration-resistant design |
| 🏗️ Build Quality | Aluminum housing with high-efficiency PCB for heat dissipation |
| 🔧 Installation | Plug-and-play for turn signal, additional wire tapping for DRL activation (no major modifications required) |
| 🚗 Applications | Front turn signal upgrade, DRL conversion, automotive retrofits and custom projects |
| ✅ Compatibility | Universal fit for most European, Japanese, Indian & American vehicles with listed socket types |
Why This Dual-Color Turn Signal LED Exists
Many cars sold in India either do not have factory DRLs or use basic halogen indicator bulbs that look dated and offer limited daytime visibility. Retrofitting OEM DRLs is expensive, while aftermarket DRL kits often require bumper removal, extra controllers, and permanent wiring changes.
The TecUpdater 66 SMD 4014 Dual-Color LED Turn Signal Bulb solves this by combining white DRL and amber turn signal in a single bulb. It upgrades both appearance and safety without adding external DRL modules or modifying the headlamp housing.
Where This Bulb Is Used
This bulb is installed in the front turn signal / indicator position of the headlamp assembly. Once installed:
The bulb works as a white DRL when ignition is ON
Switches instantly to amber when the turn signal is activated
Automatically returns to white after the indicator cycle ends
This behaviour is fully automatic and does not confuse other road users.
Dual-Color Switchback Working Explained
The bulb uses intelligent switchback logic:
White DRL Mode (4.2W)
Improves daytime visibility and gives the car a clean, modern OEM-style look.Amber Turn Signal Mode (25.2W)
Overrides white instantly when the indicator is engaged, ensuring clear and legally correct signaling.Automatic Priority Logic
Amber always takes priority over white, and DRL resumes only after signaling ends.
This makes the bulb safe, functional, and visually premium.
Connector Variants and Compatibility
The bulb is available in two widely used base types:
PY21W / BAU15S / 1156
Common in Volkswagen, Skoda, Hyundai, Tata, and many Indian-spec cars.T20 / 7440 / W21W
Used in several Japanese and newer vehicles.
Compatibility depends on bulb holder type, not brand alone.
Installation Logic (Important)
The bulb itself is plug and play in the indicator socket
DRL function requires a simple wire tap to:
Ignition line
Parking lamp
Existing DRL power (if present)
No cutting of factory wiring is required. No external DRL controller is needed.
CANBUS Error-Free Operation
Standard LED bulbs often cause:
Hyper-flash
Bulb-out warnings
Dashboard errors
This TecUpdater bulb includes built-in CANBUS resistance, ensuring:
No warning lights on most modern cars
Stable, flicker-free operation
Correct indicator speed
Build Quality & Performance
66 × 4014 high-intensity SMD LEDs for uniform output
360° beam pattern for even reflector coverage
Aluminium housing for effective heat dissipation
Designed for long operating cycles without brightness drop
Who Should Buy This
This product is ideal if:
Your car does not have factory DRLs
You want DRL + indicator in one clean solution
You want a modern OEM-style front lighting upgrade
You want CANBUS-safe LEDs without extra modules
Who Should Not Buy This
This product is not suitable if:
Your car already has dedicated factory DRLs
You are looking for decorative RGB or show lighting
You are unwilling to do a basic wire tap for DRL power
Real-World Use Cases
DRL conversion for non-DRL vehicles
Indicator brightness upgrade
Clean headlamp aesthetic upgrade
Custom automotive lighting projects
Switchback DRL Turn Signal LED Bulb — Overview
Packing 66 high-intensity 4014 SMD chips into one housing, this switchback DRL turn signal LED bulb switches between a white DRL glow and an amber turn signal automatically. Built as a CANBUS error-free unit for PY21W and T20 style sockets, this switchback DRL turn signal LED bulb converts any non-DRL car into a DRL-equipped one.
Looking for a different signal or indicator bulb? Check below.
LED Turn Signal Indicator Bulbs T20 7440 W21W – High Brightness CANBUS, 1 Pair
₹820.00 Select options This product has multiple variants. The options may be chosen on the product pageLED Indicator and Brake Bulb PY21W, P21W, P21/5W, T20 – Glass Lens 144 SMD CANBUS, 1 Pair
Price range: ₹750.00 through ₹780.00 Select options This product has multiple variants. The options may be chosen on the product pagePY21W & 1156 BA15S LED Bulbs – Amber and White Options, No Error, Also Fits T20 and P21W, 1 Pair
₹980.00 Select options This product has multiple variants. The options may be chosen on the product page
FAQs
This switchback LED turn signal bulb set carries a 6 month warranty.
This product is eligible for return or exchange as per TecUpdater’s policy.
It is sold as a set of 2 bulbs, making 1 pair.
The bulb itself is plug-and-play in the indicator socket. Getting the DRL function working additionally requires a simple wire tap to the ignition line, parking lamp, or an existing DRL power source, but this does not involve cutting any factory wiring or adding an external controller.
Yes. This bulb is designed to convert a non-DRL vehicle into a DRL-equipped one by combining a white daytime running light with the amber turn signal in a single bulb.
It shows a 6000K white light as the DRL during normal driving. The moment the turn signal is activated, it instantly switches to amber, then automatically reverts back to white once the indicator cycle ends.
This depends on your vehicle’s turn signal bulb holder. PY21W/BAU15S/1156 is common in Volkswagen, Skoda, Hyundai, Tata, and many Indian-spec cars, while T20/7440/W21W is used in several Japanese and newer vehicles.
No. The bulb has built-in CANBUS resistance, which prevents hyperflash, bulb-out warnings, and dashboard error codes on most modern cars.
No. Activating the DRL function only requires tapping into the ignition line, parking lamp, or existing DRL power, with no cutting of factory wiring and no external DRL controller needed.
They are rated for 30,000-plus hours of operation.
No. The bulb uses automatic priority logic where amber always overrides white the moment the indicator is engaged, and white DRL light resumes only after the signal cycle ends.
For the turn signal function, yes, it is plug-and-play into the existing socket. Enabling the extra white DRL feature is an optional additional step that needs the simple wire tap described above.
Browse more options in our Signal Lights (Indicators, brake lights etc.) category.
Osama Khan –
Working perfectly. I installed in my Swift 2015. Very bright DRL even in full day light.
Balaji Sundar –
I am using it since some time. Quality is very good and bright. It is a smart upgrade to add DRL is old cars.
Rahul Nair –
Very good product