Skin inflammation (dermatitis) sometimes develops around a venous ulcer. Non-venous skin ulcers are less common. For example, a skin ulcer may be caused by poor circulation due to narrowed arteries in the leg, problems with nerves that supply the skin, or other problems. The treatment for non-venous ulcers is different to that of venous ulcers. The rest of this leaflet deals only with venous leg ulcers.
But with the new lumen measurement, you can know exactly, without guessing, the brightness of light a certain number of lumens will produce. Let's consider some examples that compare and convert watts to lumens: â¢ 1  A 40-watt incandescent bulb equals around 450 lumens. â¢  A 60-watt incandescent bulb equals 800 lumens.
One lumen is approximately equal to the amount of light put out by one birthday candle thatâs one foot away from you. To help you get an idea of the lumen scale, a standard 60-watt bulb puts out around 750-850 lumens of light. If youâre choosing bulbs for task lighting, look for bulbs with 1000 lumens or more.