My understanding is that LF offers a couple of lamps that fit in-between SF's LOLA and HOLA. For example: If you want longer run-time with less light, go with the P90. More light-less run-time HO-9, even more light and great throw E0-9, but less run-time. Most light, but shortest run-time, P91. Also the LFs have more throw, especially the EO-9, while the SF P91 has the most flood of the group. For me, the most flood and most light overall sounded good, so I use the P91 a lot. I'm running a rechargable set-up, otherwise that 18-25 minute run-time, and subsequent battery replacement, just wouldn't be very fun on the wallet.