A reduction in energy consumption is only achieved with current-controlled gear.
The lamps operate perfectly with power-controlled gear, but in that case the light output can be up to 10% higher.
A lamp breaking is extremely unlikely to have any impact on your health. If a lamp breaks, ventilate the room for 30 minutes and remove the parts, preferably with gloves. Put them in a sealed plastic bag and take it to your local waste facilities for recycling. Do not use a vacuum cleaner.