Find the Osram Dulux D 13W 840 at the best prices from Any-Lamp! With fantastic discount tiers in place you save more as you buy more. Fast, reliable shipping, which is free of charge on larger orders! Contact us to find out more now. Osram Dulux D 10W 840 Specifications The Osram Dulux D can be used in combination with a conventional ballast. The lamp has a short and compact lamp base type G24d-1. This means that each of these compact fluorescent lamps has a base with 2 pins. The lamps Osram Dulux D 13W 840 has a length of 138 mm. Osram Dulux D 10W 840 has an energy rating label of B and an average lifespan of 10,000 hours. If the lamp starts flashing and has a delayed start-up time then it needs replacing. Osram Dulux D 10W 840 Uses The Osram Dulux D 13W 840 can be used in many different places. The 4000K produces a sharp white light that is referred to as 'cool white'. This is ideal for working environments and so is most commonly found in warehouses. Note: If you are currently using a fluroescent lamp, you cannot select a different wattage from which you are now using. This is because different wattages require different gear and have different lengths.