OSRAM Cool Blue Boost HB4 (Twin) at Car Bulbs Direct.

OSRAM Cool Blue Boost HB4 (Twin)
OSRAM Cool Blue Boost HB4 (Twin)OSRAM Cool Blue Boost HB4 (Twin)OSRAM Cool Blue Boost HB4 (Twin)

Competitive prices and fast delivery, been very impressed.

— Lee, USA

OSRAM Cool Blue Boost HB4 (Twin)

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  • 5000K colour temperature
  • High-wattage
  • Up to 50% extra light 
  • Not road legal

The right choice – what does the OSRAM Cool Blue Boost HB4 (Twin) offer?

For drivers wanting the ultimate combination of style and sight. OSRAM’s Cool Blue Boost range offers tremendous light production without compromising on style. The bulbs’ colour temperature of 5000K ensures an intense white light with a slight blue tint and shine up to 50% brighter than a standard halogen. Extra light on the road makes for extra safety on the road, and with OSRAM Blue Boost’s precise light arc projection you needn’t worry about this extra light straying from the road into fellow drivers’ eyes – it is projected perfectly on the road, where it belongs.

The OSRAM Cool Blue Boost differs from other styling bulbs in the market, which offer a higher colour temperature via simply adding a blue coating to the bulb’s glass. Though this does create a whiter light, it often also makes the beams projection on the road slightly dimmer. The Cool Blue Boost remedies this problem by running at a higher wattage, allowing brighter, whiter light to be produced without losing extra vision on the road.

The 5000K colour temperature of the Cool Blue Boosts delivers a close colour match to factory-fitted Xenon HID bulbs, offering a crisp, bright white light with a slight blue tint.  

NOTE: At 80W these bulbs have a higher wattage than common halogens. As such, it is important that you ensure that your vehicle's headlight can sustain the increased heat that they generate before purchasing. Your vehicle's wiring has to be able to be rated for the higher current (~6.5A). Alternatively, if it is unclear, the bulb should be operated via a relay.

Product features

  • 5000K light colour temperature
  • Produces up to 50 % more light than standard
  • White light colour with slight blue tint
  • Light colour closely resmbles that of Xenon HID bulbs
  • Precise projection of light cone
  • High OSRAM production standards
  • Not road legal – for off-road use only e.g. rally type applications


Manufacturer OSRAM
Fitting H9
Number of Bulbs 2
Road Legal Yes
Kelvin Rating 5000K
Wattage 80W
Voltage 12V
Technology Halogen
Range Cool Blue Boost
EAN 4052899439900

About Osram

As the industry leader in automotive lighting, OSRAM bulbs are fitted as standard in over 50% of cars worldwide. Only the highest quality precision materials are used to produce the most trusted and technologically innovative bulbs available.

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Delivery Information

We aim to send all orders the same/next business day. Delivery times on our FREE standard delivery service are:

UK: 1-2 business days*
Rest of the World: 2-7 business days*

Need your order faster?
Customers in the UK, US & Canada can also use our express delivery service. Delivery times for this service are:

UK Next Business Day (InterLink): £5.00
US & Canada 2-4 Business Days (FedEx): $9.99

*average delivery times.

RRP: £32.99


incl. FREE delivery

You save: £12.00 (36%)

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  • Free worldwide delivery *
  • Free 12 month warranty