Nothing it is as you say HLG 650 is more powerful and costs less lol
The Phillips Toplight Compact is... Get Ready.
2650umol at 680w.
Grow lights available for light-loving crops (up to 2650 μmol/s) for low operational costs (efficacy up to 3.6 μmol/J) • Plug and play design saves time and money on installation • Wide or standard beam provide optimal light distribution for any crop
High light output for light-loving crops
Beam
Voltage 400v
Deep Red/Blue/Low Blue Photon Flux 2650umol 780w
Deep Red/White/Low Blue 2600 800w
Deep Red/White/Mid Blue 2550 780w
Standard beam
Efficacy µmol/J 3.4
3.3
3.3
They also make one thats less powerful, but more efficient at 3.6 umol/j
High efficacy for lowest operational costs
Standard Beam
Voltage 200v-400v
Deep Red/Blue/Low Blue Photon Flux Density 1850umol 520w
Deep Red/White/Low Blue 1800umol 520w
Deep Red/White/Mid Blue 1750umol 520w
Deep Red/White/Far Red 1650umol 520w
Efficacy µmol/J 3.6 -3.5- 3.4 - 3.2
And another one
Optimized performance for optimal combination of efficacy and light output
Standard Beam
Voltage 277v-400v
Deep Red/Blue/Low Blue Photon Flux Density 2200umol......645w
Deep Red/White/Low Blue 2150umol......645w
Deep Red/White/Mid Blue 2100umol.......645w
Deep Red/White 1650umol.......645w
Typical photon flux µmol/s 2200 2150 2100 1650 Power consumption W 645 645 645 645 Efficacy µmol/J 3.4 3.3 3.3 2.6
Wide beam
Typical photon flux
µmol/s 2000umol
1950umol
1900umol
Deep Red/White Not Rated
Power consumption W 645 645 645 Efficacy µmol/J 3.1 3.0 2.9