I export all sorts of LED lighting so if u need to know anything specifically let me know.
LED is te general term used to describe these technoplogy. Altho often people use it to mean all LED lights (i.e. 5mm lights) before the intro of SMD an COB.
SMD is newer and better than standard LED - as shown above, SMDs appear to look like little chips with yellow dots inside.
SMDs come in a variety of size with 3528 and 5050 generally being the oldest tech, conversely 3014, 5630 and 2835 are generally newer chips which have heat sinks built inside them.
3528 are about 0.07 watts, 6-7 lumens output; 5050 are about 0.24 watts, 18-21 lumens.
3014 are 0.1 watts, 10-13 lumens; 5630 are 0.5 watts, 45 lumens; 2835 are 0.2 watts, 22-24 lumens.
2835 are best so far in terms of heat dissapation and package size. But also most expensive.
Recently in tube lights 3014 are being used more due to their size being smallest so you can fit more in the same unit area.
It just all really depends on how many chips, of how much lumens per watt power. Obviously goes without saying, chips designed by Samsung, Philips and Epistar are true to specification and very bright, but in our market, undoubtedly, chinese manufactured ones prevail and are widespread. A Philips tube for 1300RS is kind of too cheap to believe i'll be honest.
Show me what you are insterested in and i'll advise u appropriately. Or you can use the above details to determine which combination of SMD tube will offer your needs the best lumens per watts.