Using these Philips halogen bulbs is easy. Just make sure your downlight fixture has a GU10 base. Simply insert the bulb into the base until it fits snugly. When using, ensure the power supply is 240VAC as specified. Avoid touching the bulb with bare hands as the oils from your skin can cause uneven heating and shorten the bulb's lifespan. If you need to handle the bulb, use a clean cloth. For maintenance, turn off the power before checking or replacing the bulb. Store any unused bulbs in a cool, dry place to keep them in good condition.