It is so easy to get it wrong. My living room swapped from 10 x 8W CFL to 10 x 3W LED theroy said these should be dimmer dropping from 3500 lumen to 2800 lumen, but in reality the LED lamps are brighter.
When I started to look at lumen output LED verse fluorescent I realised it's down to individual lamps I have an 11W folded tube in my computer room which will give any LED a run for it's money and not even HF.
The problem is although lumen was designed to compare light output in the real world it has failed. Some test the bulb after being on 5 minuets others for example automotive after an hour, some measure the light output of a unit other the light output of each LED x number fitted in the unit. Also with LED when dimmed the colour temperature remains the same where with tungsten when dimmed they become redder.
Other countries went to CFL and LED before us, and they tend to split lights 1/3 and 2/3 so simple switching gives three levels of light. This also means the lamps are cheaper. There seems to be a move away from bulbs with LED because they are so long lasting. Also there are replacements for the fluorescent tube which are LED.
But the main problem seems to be the LED is a current dependent device and some method is required to limit the current. This can be a switched mode power supply or a simple resistor so the same base LED when used with a switched mode power supply is super efficient but with a resistor is worse than normal fluorescent.
So a pineapple lamp with 65 LED's could simply have a resistor to limit current where a lamp with 6 LED's (assuming 230 volt) would have to use a switch mode device. Some units give a voltage 150 ~ 250 clearly these are switch mode. Lights designed for caravans
with a 10 ~ 30 volt range are clearly also switch mode, but many 12 volt lamps use a simple resistor.
The lamps are moving on with leaps and bounds and it's hard to keep pace with development. Personally I would stick to bulbs, so I can swap for different size if I get it wrong, and would avoid dim-able versions as these tend to be more expensive, instead wire 1/3 and 2/3 so two switches give 3 light outputs.
