Cool White 4000K. Being almost circular, they are a great alternative to linear fluorescent tubes; compact, bright, they provide a good all round light. The regulations vary from country to country.
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ARCTIC S12038-4K/ S12038-8K Server Fan, 120x120x38 mm, PWM Regulated, 4-pin Connector, 12 V DC, Rack Cooling Fan
Aliexpress UK
Cool White 4000K. Being almost circular, they are a great alternative to linear fluorescent tubes; compact, bright, they provide a good all round light. The regulations vary from country to country.
eBay
Antec Computer Case Fan PWM 4 Pin 120mm Silent Fan CPU Cooler Cooling Fan Cooling Radiator Fan 12V Adjust Fan
Aliexpress UK
Ballast compatible incandescent bulb, incompatible led bulb. Ballast will cause the bulb flicker and even not work. [Square LED Bulb] This is 2d 4 Pin gr10q led bulb, warm white 3000k 190 190mm,Non-Dimmable.
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Antec Computer Case Fan PWM 4 Pin 5V 3Pin ARGB 120mm Silent Fan CPU Cooler Cooling Fan Cooling Radiator Fan 12V Adjust Fan
Aliexpress UK
1x Sylvania 38W GR10Q, 4 pin, Double D Energy Saving Light Bulb, 2D Lamp. White 3500K. Being almost circular, they are a great alternative to linear fluorescent tubes; compact, bright, they provide a good all round light.
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Notebook Cooler Fan Mechanical Laptop Radiator for HP 260 G1 G2 DM PC KSB0505HA-C 5V 0.368A 4 pin CPU Cooling Fan
Aliexpress UK
4-Pin GR10Q Base: TobeBright 16W bathroom bulb features a 4-pin GR10q base, distinct from the 2-pin GR8! Easy to install, give the bulb a slight twist until it securely locks into place on the base.
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CPU Cooling Fan for Heatsink for Lenovo Thinkpad X220 X220i X220s X220T X230 X230i X230T Series 04W0435 04W6921 4-Pins 4-Wires
Aliexpress UK
16/28 watt GR10q 2D GR8. Cap/Base : GR10Q / GR8. 2D Energy saving Fluorescent Tube. Similar Incandescent. Colour Rendering Index (CRI) : 80. Beam angle : 360 degrees. These bulbs provide more light due to its butterfly shape.
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10pcs 65mm Screw Pin Rivet Rubber PC Fan Noise Absorbtion Fans Anti Vibration Mount Silicone Screws Noise Reduction Equipment
Aliexpress UK
The product is a 1x 14W Replacement LED GR10q 4 pin 4000K Cool White Light Bulb by Bell. This energy-saving bulb has a 2D circular shape and a beam angle of 180° or more. It has a bright white/cool white colour temperature and a lifespan of 15,000-19,999 hours. The product features a 4 pin connection and needs to have the ballast bypassed/removal for optimal performance. Made in China, this LED bulb offers a high-quality alternative to traditional lighting options.
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CPU Fan CPU Cooling Fan 4 Pin Strong Heat Dissipation CPU Cooler for Intel NUC8i7BEH NUC8i3BEH NUC8i5BEH NUC8i5BEK CPU Cooling
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2D 2 or 4 Pin 16W 28W 38W Compact Fluorescent Energy Saving Bulb White. The EverReady 2D compact fluorescent bulbs are low energy and high output. Suitable for security lights, warehouses, storage spaces, garages as well as many other areas where a bright light is needed.
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Thermalright TL-C12C X5 1/3/5 Pack Computer Case Fan, 120mm Case Fan/High Airflow/Static Pressure/4 PIN PWM/1550 RPM/66.17 CFM
Aliexpress UK