GrowRoom YPF and YPFD Calculator play online

Having the right light and the right amount of light in your grow room is crucial to obtaining the best yields at the lowest price.

This is where the Y factor comes in, YPF and YPFD are the counterparts of PPF and PPFD, the Y stands for 'Yield'.

YPF would for example show the amount of light that is used by your plants compared to PPF that shows the amount of light outputted by your lamp.

Our app helps you accurately calculate all of these values and more to help you achieve the perfectly balanced growing environment.


You can use this app to accurately plan the different phases of your grow using the slider in conjunction with the lamps power level to allow for exactly the right amount of light in your area for your current grow period.


Compare one lamp against another to see which is best for your room and plant type.



You can use our tool to help plan your upcoming rooms.




Using the tools provided you can achieve huge energy savings in your grow rooms helping your pocket and the environment.


If you have photo metric reports including .ies files for other horticultural lamps we will be happy to include the data in the next update.