I’m looking for several roll LED strips, 4000-5000K and they must be as bright as possible.
There are many SMD LED types but ultimately the brightness is limited by the resistor. LED strips are cheap enough to have them replaced every 3 years so I don’t expect them to last very long if driven hard.
If you know which LED strip to buy please chime in, thanks!
You want high CRI LEDs strips.
These are excellent. You can choose from 3000-6500k CCT.
High CRI and high brightness combined. You do have to pay though, and it is worth it.
You can see a comparison of the different SMDs from one source here: https://www.saving-star.com/smd-led-comparison/ but I don’t know where they got the figures for output. In general, the bigger the size of the chip, the more lumens it puts out at a slightly greater efficiency. I’ve even purchased aluminum backed strips with SMD 8520 LEDs and they are the brightest I have found so far.
Epistar LED Specifications (3528 vs 5050 vs 5630) From Heralco Lights website
LED SMD/ Dimensions/ Chip Surface Area/ Lumen Flux/ Power Consumption
3528 LED/ 3.5 mm x 2.8 mm/ 9.8 mm²/ 6-8 lumens/ 20-30 mA @ 2.8-3.4 Volts
5050 LED/ 5.0 mm x 5.0 mm/ 25 mm²/ 16-22 lumens/ 60 mA @ 2.8-3.4 Volts
5630 LED/ 5.6 mm x 3.0 mm/ 16.8 mm²/ 45-50 lumens / 150 mA @ 2.8-3.4 Volts
Notice that the individual LEDs all run at the same voltage no matter what the SMD number. The purpose of the resistor that accompanies each group of 3 LEDs is to match the voltage applied to the entire strip to the voltage needed by the LED. You can get strips rated 5V, 12V, and 24V and the resistors will differ, depending on the voltage applied.