Not all eco-lightbulbs are the same here’s Alok Jha recommended lightbulbs.

LED spotlight – Philips Econic, 3W

Unlike CFLs, this switches to full brightness immediately and runs cooler. Identical size to halogen spotlights and very similar colour light, though less sparkly. Quite a tightly focused light, however, so you will need a few around your room. Also relatively expensive, but then it will last for 15 years.

CFL stick – Philips Genie, 8W

Has near-instantaneous start-up, getting up to full brightness with a warm, yellowy-white colour in less than 10 seconds. Good for general use in lounges, hallways and bedrooms.

LED candle – Philips Novallure, 10W

Same advantages as the Econic in terms of cool running and instant switch-on, but this is meant for chandeliers. The LED light is made to sparkle slightly, thanks to a glass light-guide inside the bulb.

CFL dimmable – Sylvania Mini-Lynx Step, 20W

For anyone with dimmer switches, this will allow you to adjust your lighting levels to your heart’s content. Still a relatively new technology for CFLs, so expect to pay marginally more – but the costs will come down.

CFL small globe – Megaman GA607, 7W

For lamps or light fittings with several small bulbs. Robust (like all Megaman bulbs) and available in four shades of white, from warm to daylight. Each one is rated to last 10,000 hours. Source: The Guardian.